Quarterly report pursuant to Section 13 or 15(d)

Other Comprehensive Income (Details)

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Other Comprehensive Income (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Pretax        
Total other comprehensive income (loss), pretax $ 33,689,000 $ 124,934,000 $ 58,511,000  
Tax (Expense) Benefit        
Total other comprehensive income (loss), tax (expense) benefit (11,850,000) (43,556,000)    
After-tax        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 2,716,000 61,234,000 20,562,000 57,504,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax 16,343,000 16,634,000 6,674,000 2,212,000
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 3,243,000 2,600,000 6,486,000 5,200,000
Total other comprehensive income (loss) 21,839,000 81,378,000 37,786,000 74,953,000
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (173,763,000) (197,496,000)
Period change     37,786,000 74,953,000
Ending Balance (135,977,000) (122,543,000) (135,977,000) (122,543,000)
Other Comprehensive Income (Textual) [Abstract]        
Unrealized losses transferred from the available for sale securities portfolio to the held to maturity securities 200,000   200,000  
Unrealized gains and losses on debt securities [Member]
        
Pretax        
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, pretax (713,000) 1,400,000 6,252,000 15,441,000
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, pretax 4,575,000 95,468,000 31,362,000 89,743,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax (350,000) (1,507,000) 263,000 (1,547,000)
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax 3,512,000 95,361,000 37,877,000 103,637,000
Tax (Expense) Benefit        
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, tax (expense) benefit 250,000 (490,000) (2,188,000) (5,404,000)
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, tax (expense) benefit (1,661,000) (33,242,000) (11,223,000) (31,266,000)
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit 123,000 527,000 (92,000) 541,000
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit (1,288,000) (33,205,000) (13,503,000) (36,129,000)
After-tax        
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, after-tax (463,000) 910,000 4,064,000 10,037,000
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, after-tax 2,914,000 62,226,000 20,139,000 58,477,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, after-tax (227,000) (980,000) 171,000 (1,006,000)
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 2,224,000 62,156,000 24,374,000 67,508,000
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (29,267,000) (101,290,000)
Period change     24,374,000 67,508,000
Ending Balance (4,893,000) (33,782,000) (4,893,000) (33,782,000)
Unrealized gains and losses on equity securities [Member]
        
Pretax        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax 44,000 (18,000) 387,000 52,000
Tax (Expense) Benefit        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit (15,000) 6,000 (135,000) (19,000)
After-tax        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 29,000 (12,000) 252,000 33,000
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (30,000) (427,000)
Period change     252,000 33,000
Ending Balance 222,000 (394,000) 222,000 (394,000)
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 23,211,000 34,460,000 (16,457,000) (4,236,000)
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax 1,932,000 (8,869,000) 26,725,000 7,640,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, pretax 25,143,000 25,591,000 10,268,000 3,404,000
Total other comprehensive income (loss), pretax       115,093,000
Tax (Expense) Benefit        
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, tax (expense) benefit (8,117,000) (12,060,000) 5,759,000 1,494,000
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit (683,000) 3,103,000 (9,353,000) (2,686,000)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, tax (expense) benefit (8,800,000) (8,957,000) (3,594,000) (1,192,000)
Total other comprehensive income (loss), tax (expense) benefit     (20,725,000) (40,140,000)
After-tax        
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, after-tax 15,094,000 22,400,000 (10,698,000) (2,742,000)
Less: Reclassification adjustment for net losses (gains) losses included in net income, after tax 1,249,000 (5,766,000) 17,372,000 4,954,000
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax 16,343,000 16,634,000 6,674,000 2,212,000
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     40,898,000 35,710,000
Period change     6,674,000 2,212,000
Ending Balance 47,572,000 37,922,000 47,572,000 37,922,000
Accumulated Unrealized Losses for Pension and Other Post-retirement obligations [Member]
        
Pretax        
Change in pension and post-retirement benefit plan assets and liabilities, pretax 4,990,000 4,000,000 9,979,000 8,000,000
Tax (Expense) Benefit        
Change in pension and post-retirement benefit plan assets and liabilities, tax (expense) benefit (1,747,000) (1,400,000) (3,493,000) (2,800,000)
After-tax        
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 3,243,000 2,600,000 6,486,000 5,200,000
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (185,364,000) (131,489,000)
Period change     6,486,000 5,200,000
Ending Balance $ (178,878,000) $ (126,289,000) $ (178,878,000) $ (126,289,000)