Annual report pursuant to Section 13 and 15(d)

HELD-TO-MATURITY SECURITIES - Schedule of Continuous Unrealized Loss Position (Details)

v3.3.1.900
HELD-TO-MATURITY SECURITIES - Schedule of Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value:    
Less Than Twelve Months, Fair Value $ 4,118,300 $ 752,484
Over Twelve Months, Fair Value 533,432 693,757
Fair Value 4,651,732 1,446,241
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss:    
Less than 12 Months, Unrealized Losses (28,107) (6,135)
Over 12 Months, Unrealized Losses (12,307) (17,138)
Unrealized Losses (40,414) (23,273)
Federal agencies: Mortgage-backed    
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value:    
Less Than Twelve Months, Fair Value 3,692,890 707,934
Over Twelve Months, Fair Value 519,872 622,026
Fair Value 4,212,762 1,329,960
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss:    
Less than 12 Months, Unrealized Losses (25,418) (5,550)
Over 12 Months, Unrealized Losses (12,086) (16,186)
Unrealized Losses (37,504) (21,736)
Federal agencies: Other agencies    
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value:    
Less Than Twelve Months, Fair Value 425,410 36,956
Over Twelve Months, Fair Value 6,647 71,731
Fair Value 432,057 108,687
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss:    
Less than 12 Months, Unrealized Losses (2,689) (198)
Over 12 Months, Unrealized Losses (97) (952)
Unrealized Losses (2,786) (1,150)
Total U.S. Government backed agencies    
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value:    
Less Than Twelve Months, Fair Value 4,118,300 744,890
Over Twelve Months, Fair Value 526,519 693,757
Fair Value 4,644,819 1,438,647
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss:    
Less than 12 Months, Unrealized Losses (28,107) (5,748)
Over 12 Months, Unrealized Losses (12,183) (17,138)
Unrealized Losses (40,290) (22,886)
Municipal securities    
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value:    
Less Than Twelve Months, Fair Value 0 7,594
Over Twelve Months, Fair Value 6,913 0
Fair Value 6,913 7,594
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss:    
Less than 12 Months, Unrealized Losses 0 (387)
Over 12 Months, Unrealized Losses (124) 0
Unrealized Losses $ (124) $ (387)