Annual report pursuant to Section 13 and 15(d)

Held-to-Maturity Securities (Details)

v2.4.0.6
Held-to-Maturity Securities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Contractual maturities of held-to-maturity securities  
Held-to-maturity Securities, 1-5 years $ 0
Held-to-maturity securities, Total 640,551
Held-to-maturity Securities, Fair Value 660,186
Amortized cost, gross unrealized gains and losses, and fair value by investment category  
Held-to-maturity securities, Total 640,551
Held-to-maturity Securities, Gross Gain 19,652
Held-to-maturity Securities, Gross Losses (17)
Held-to-maturity securities, fair value 660,186
Federal agencies - mortgage backed securities [Member]
 
Contractual maturities of held-to-maturity securities  
Held-to-maturity Securities, Under 1 year 0
Held-to-maturity Securities, 6-10 years 0
Held-to-maturity Securities, Over 10 years 640,551
Held-to-maturity securities, Total 640,551
Fair Value, Under 1 year 0
Fair Value, 1-5 years 0
Fair Value, 6-10 years 0
Fair Value, Over 10 years 660,186
Held-to-maturity Securities, Fair Value 660,186
Amortized cost, gross unrealized gains and losses, and fair value by investment category  
Held-to-maturity securities, Total 640,551
Held-to-maturity Securities, Gross Gain 19,652
Held-to-maturity Securities, Gross Losses (17)
Held-to-maturity securities, fair value 660,186
Total U.S. Government backed agencies [Member]
 
Contractual maturities of held-to-maturity securities  
Held-to-maturity Securities, Net carrying amount 640,551
Held-to-maturity securities, Total 640,551
Held-to-maturity Securities, Fair Value 660,186
Amortized cost, gross unrealized gains and losses, and fair value by investment category  
Held-to-maturity securities, Total 640,551
Held-to-maturity Securities, Gross Gain 19,652
Held-to-maturity Securities, Gross Losses (17)
Held-to-maturity securities, fair value $ 660,186