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
Sep. 30, 2013
Dec. 31, 2012
Contractual maturities of held-to-maturity securities    
Held-to-maturity securities, Total $ 2,236,121 $ 1,743,876
Held-to-maturity Securities, Fair Value 2,217,359 1,794,105
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,236,121 1,743,876
Held-to-maturity Securities, Gross Gain (13,534) (50,391)
Held-to-maturity Securities, Gross Losses 32,296 162
Held-to-maturity securities, fair value 2,217,359 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 2,096,322 1,624,483
Held-to-maturity securities, Total 2,121,223 1,649,384
Fair Value, Under 1 year 0 0
Fair Value, 1-5 years 0 0
Fair Value, 6-10 years 22,764 24,739
Fair Value, Over 10 years 2,083,669 1,672,702
Held-to-maturity Securities, Fair Value 2,106,433 1,697,441
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,121,223 1,649,384
Held-to-maturity Securities, Gross Gain (13,534) (48,219)
Held-to-maturity Securities, Gross Losses 28,324 162
Held-to-maturity securities, fair value 2,106,433 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 39,346 15,108
Held-to-maturity Securities, Over 10 years 66,222 69,399
Held-to-maturity securities, Total 105,568 84,507
Fair Value, Under 1 year 0 0
Fair Value, 1-5 years 0 0
Fair Value, 6-10 years 39,206 15,338
Fair Value, Over 10 years 62,749 71,341
Held-to-maturity Securities, Fair Value 101,955 86,679
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 105,568 84,507
Held-to-maturity Securities, Gross Gain 0 (2,172)
Held-to-maturity Securities, Gross Losses (3,613) 0
Held-to-maturity securities, fair value 101,955 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 9,330 9,985
Held-to-maturity securities, Total 9,330 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 8,971 9,985
Held-to-maturity Securities, Fair Value 8,971 9,985
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 9,330 9,985
Held-to-maturity Securities, Gross Gain 0 0
Held-to-maturity Securities, Gross Losses (359) 0
Held-to-maturity securities, fair value 8,971 9,985
Total U.S. Government backed agencies [Member]
    
Contractual maturities of held-to-maturity securities    
Held-to-maturity securities, Total 2,226,791 1,733,891
Held-to-maturity Securities, Fair Value 2,208,388 1,784,120
Amortized cost, gross unrealized gains and losses, and fair value by investment category    
Held-to-maturity securities, Total 2,226,791 1,733,891
Held-to-maturity Securities, Gross Gain (13,534) (50,391)
Held-to-maturity Securities, Gross Losses 31,937 162
Held-to-maturity securities, fair value $ 2,208,388 $ 1,784,120