Annual report pursuant to Section 13 and 15(d)

Other Comprehensive Income (Activity/Rollforward) (Details)

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Other Comprehensive Income (Activity/Rollforward) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pretax      
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, before-tax $ 235,000 $ 19,215,000 $ 11,537,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax 6,211,000 (4,769,000) 3,681,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax (15,188,000) 14,992,000 3,107,000
Amortization of net actuarial loss and prior service cost included in income, pretax (13,106,000) 27,013,000 21,261,000
Total other comprehensive income (loss), pretax (97,404,000) 36,110,000 36,513,000
Tax (Expense) Benefit      
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, tax (expense) benefit (82,000) (6,725,000) (4,038,000)
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit (2,174,000) 1,669,000 (1,288,000)
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit 5,316,000 (5,237,000) (1,091,000)
Amortization of net actuarial loss and prior service cost included in income, tax (expense) benefit 4,588,000 (9,455,000) (7,441,000)
Total other comprehensive income (loss), tax (expense) benefit 34,212,000 (13,164,000) (12,780,000)
After-tax      
Transisition obligation 153,000 12,490,000 7,499,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, after-tax 4,037,000 (3,100,000) 2,393,000
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale (77,593,000) 55,305,000 64,921,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, after-tax (9,872,000) 9,755,000 2,016,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax (65,928,000) 6,186,000 5,188,000
Amortization of net actuarial loss and prior service cost included in income, net of tax (8,518,000) 17,558,000 13,820,000
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 80,176,000 (51,035,000) (53,875,000)
Total other comprehensive income (loss) (63,192,000) 22,946,000 23,733,000
Activity in accumulated other comprehensive income, net of tax      
Beginning Balance (150,817,000) (173,763,000) (197,496,000)
Period change (63,192,000) 22,946,000 23,733,000
OCI before reclassifications (48,839,000)    
Amounts reclassified from accumulated OCI (14,353,000)    
Ending Balance (214,009,000) (150,817,000) (173,763,000)
Other Comprehensive Income (Textual) [Abstract]      
Unrealized losses transferred from the available for sale securities portfolio to the held to maturity securities 200,000    
Unrealized gains and losses on debt securities [Member]
     
Pretax      
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, pretax (125,919,000) 90,318,000 95,586,000
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax (119,473,000) 104,764,000 110,804,000
Tax (Expense) Benefit      
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, tax (expense) benefit 44,191,000 (32,137,000) (33,455,000)
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit 41,935,000 (37,193,000) (38,781,000)
After-tax      
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, after-tax (81,728,000) 58,181,000 62,131,000
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale (77,538,000) 67,571,000 72,023,000
Activity in accumulated other comprehensive income, net of tax      
Beginning Balance 38,304,000 (29,267,000) (101,290,000)
Period change (77,538,000) 67,571,000 72,023,000
Ending Balance (39,234,000) 38,304,000 (29,267,000)
Unrealized gains and losses on equity securities [Member]
     
Pretax      
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax 151,000 344,000 612,000
Tax (Expense) Benefit      
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit (53,000) (120,000) (215,000)
After-tax      
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 98,000 224,000 397,000
Activity in accumulated other comprehensive income, net of tax      
Beginning Balance 194,000 (30,000) (427,000)
Period change 98,000 224,000 397,000
Ending Balance 292,000 194,000 (30,000)
Unrealized gains and losses on cash flow hedging derivatives [Member]
     
Pretax      
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, pretax (86,240,000) (5,476,000) 4,875,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, pretax (101,428,000) 9,516,000 7,982,000
Tax (Expense) Benefit      
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, tax (expense) benefit 30,184,000 1,907,000 (1,703,000)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships 35,500,000 (3,330,000) (2,794,000)
After-tax      
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, after-tax (56,056,000) (3,569,000) 3,172,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax (65,928,000) 6,186,000 5,188,000
Activity in accumulated other comprehensive income, net of tax      
Beginning Balance 47,084,000 40,898,000 35,710,000
Period change (65,928,000) 6,186,000 5,188,000
OCI before reclassifications (56,056,000)    
Amounts reclassified from accumulated OCI (9,872,000)    
Ending Balance (18,844,000) 47,084,000 40,898,000
Accumulated Unrealized Losses for Pension and Other Post-retirement obligations [Member]
     
Pretax      
Net actuarial gains (losses) arising during the year, pretax 136,452,000 (105,527,000) (104,146,000)
Change in pension and post-retirement benefit plan assets and liabilities, pretax 123,346,000 (78,514,000) (82,885,000)
Tax (Expense) Benefit      
Net actuarial gains (losses) arising during the year, tax (expense) benefit (47,758,000) 36,934,000 36,451,000
Change in pension and post-retirement benefit plan assets and liabilities, tax (expense) benefit (43,170,000) 27,479,000 29,010,000
After-tax      
Net actuarial gains (losses) arising during the year, net of tax 88,694,000 (68,593,000) (67,695,000)
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 80,176,000 (51,035,000) (53,875,000)
Activity in accumulated other comprehensive income, net of tax      
Beginning Balance (236,399,000) (185,364,000) (131,489,000)
Period change 80,176,000 (51,035,000) (53,875,000)
OCI before reclassifications 88,694,000    
Amounts reclassified from accumulated OCI (8,518,000)    
Ending Balance (156,223,000) (236,399,000) (185,364,000)
Equity Securities [Member] | Unrealized gains and losses on equity securities [Member]
     
Activity in accumulated other comprehensive income, net of tax      
OCI before reclassifications 98,000    
Amounts reclassified from accumulated OCI 0    
Debt Securities [Member] | Unrealized gains and losses on debt securities [Member]
     
Activity in accumulated other comprehensive income, net of tax      
OCI before reclassifications (81,575,000)    
Amounts reclassified from accumulated OCI $ 4,037,000