Quarterly report pursuant to Section 13 or 15(d)

Held-to-Maturity Securities (Details)

v2.4.0.8
Held-to-Maturity Securities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Contractual maturities of held-to-maturity securities    
Held-to-maturity securities, Total $ 2,172,229 $ 1,743,876
Held-to-maturity Securities, Fair Value 2,166,749 1,794,105
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,172,229 1,743,876
Held-to-maturity Securities, Gross Gain 16,107 50,391
Held-to-maturity Securities, Gross Losses (21,587) (162)
Held-to-maturity securities, fair value 2,166,749 1,794,105
Federal agencies - mortgage backed securities [Member]
    
Contractual maturities of held-to-maturity securities    
Held-to-maturity Securities, Under 1 year 0 0
Held-to-maturity Securities, 1-5 years 0 0
Held-to-maturity Securities, 6-10 years 24,901 24,901
Held-to-maturity Securities, Over 10 years 2,055,440 1,624,483
Held-to-maturity securities, Total 2,080,341 1,649,384
Fair Value, Under 1 year 0 0
Fair Value, 1-5 years 0 0
Fair Value, 6-10 years 22,995 24,739
Fair Value, Over 10 years 2,054,902 1,672,702
Held-to-maturity Securities, Fair Value 2,077,897 1,697,441
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,080,341 1,649,384
Held-to-maturity Securities, Gross Gain 16,107 48,219
Held-to-maturity Securities, Gross Losses (18,551) (162)
Held-to-maturity securities, fair value 2,077,897 1,697,441
Other Federal Agencies [Member]
    
Contractual maturities of held-to-maturity securities    
Held-to-maturity Securities, Under 1 year 0 0
Held-to-maturity Securities, 1-5 years 0 0
Held-to-maturity Securities, 6-10 years 14,348 15,108
Held-to-maturity Securities, Over 10 years 67,898 69,399
Held-to-maturity securities, Total 82,246 84,507
Fair Value, Under 1 year 0 0
Fair Value, 1-5 years 0 0
Fair Value, 6-10 years 14,166 15,338
Fair Value, Over 10 years 65,457 71,341
Held-to-maturity Securities, Fair Value 79,623 86,679
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 82,246 84,507
Held-to-maturity Securities, Gross Gain 0 2,172
Held-to-maturity Securities, Gross Losses 2,623 0
Held-to-maturity securities, fair value 79,623 86,679
Municipal securities [Member]
    
Contractual maturities of held-to-maturity securities    
Held-to-maturity Securities, Under 1 year 0 0
Held-to-maturity Securities, 1-5 years 0 0
Held-to-maturity Securities, 6-10 years 0 0
Held-to-maturity Securities, Over 10 years 9,642 9,985
Held-to-maturity securities, Total 9,642 9,985
Fair Value, Under 1 year 0 0
Fair Value, 1-5 years 0 0
Fair Value, 6-10 years 0 0
Fair Value, Over 10 years 9,229 9,985
Held-to-maturity Securities, Fair Value 9,229 9,985
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 9,642 9,985
Held-to-maturity Securities, Gross Gain 0 0
Held-to-maturity Securities, Gross Losses 413 0
Held-to-maturity securities, fair value 9,229 9,985
Total U.S. Government backed agencies [Member]
    
Contractual maturities of held-to-maturity securities    
Held-to-maturity securities, Total 2,162,587 1,733,891
Held-to-maturity Securities, Fair Value 2,157,520 1,784,120
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,162,587 1,733,891
Held-to-maturity Securities, Gross Gain 16,107 50,391
Held-to-maturity Securities, Gross Losses (21,174) (162)
Held-to-maturity securities, fair value $ 2,157,520 $ 1,784,120