XML 210 R45.htm IDEA: XBRL DOCUMENT v3.6.0.2
Note 2 - Investment Securities - Amortized Cost, Unrealized Gains and Losses, and Estimated Fair Value of Available for Sale Investment Securities Portfolio (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Investment securities available for sale, amortized cost $ 1,908,079 $ 1,568,927
Investment securities available for sale, gross unrealized gains 18,494 15,932
Investment securities available for sale, gross unrealized losses (35,815) (14,643)
Investment securities available for sale 1,890,758 1,570,216
US Government-sponsored Enterprises Debt Securities [Member]    
Investment securities available for sale, amortized cost 141,599 302,292
Investment securities available for sale, gross unrealized gains 35 255
Investment securities available for sale, gross unrealized losses (2,974) (665)
Investment securities available for sale 138,660 301,882
Agency Residential MBS [Member]    
Investment securities available for sale, amortized cost 711,623 208,046
Investment securities available for sale, gross unrealized gains 921 1,407
Investment securities available for sale, gross unrealized losses (21,045) (6,909)
Investment securities available for sale 691,499 202,544
Non-agency Residential MBS [Member]    
Investment securities available for sale, amortized cost 272 354
Investment securities available for sale, gross unrealized gains 16
Investment securities available for sale, gross unrealized losses (1)
Investment securities available for sale 271 370
Non-agency Commercial MBS [Member]    
Investment securities available for sale, amortized cost 2,041 2,383
Investment securities available for sale, gross unrealized gains 5
Investment securities available for sale, gross unrealized losses (16) (9)
Investment securities available for sale 2,025 2,379
US States and Political Subdivisions Debt Securities [Member]    
Investment securities available for sale, amortized cost 182,230 148,705
Investment securities available for sale, gross unrealized gains 5,107 8,861
Investment securities available for sale, gross unrealized losses (3,926) (57)
Investment securities available for sale 183,411 157,509
Asset-backed Securities [Member]    
Investment securities available for sale, amortized cost 696 2,025
Investment securities available for sale, gross unrealized gains
Investment securities available for sale, gross unrealized losses (1) (22)
Investment securities available for sale 695 2,003
FHLMC and FNMA Stock [Member]    
Investment securities available for sale, amortized cost [1],[2] 749 775
Investment securities available for sale, gross unrealized gains [1],[2] 10,120 3,554
Investment securities available for sale, gross unrealized losses [1],[2]
Investment securities available for sale [1],[2] 10,869 4,329
Domestic Corporate Debt Securities [Member]    
Investment securities available for sale, amortized cost 866,835 902,308
Investment securities available for sale, gross unrealized gains 1,690 882
Investment securities available for sale, gross unrealized losses (7,668) (6,821)
Investment securities available for sale 860,857 896,369
Other Securities [Member]    
Investment securities available for sale, amortized cost 2,034 2,039
Investment securities available for sale, gross unrealized gains 621 952
Investment securities available for sale, gross unrealized losses (184) (160)
Investment securities available for sale $ 2,471 $ 2,831
[1] Federal Home Loan Mortgage Corporation
[2] Federal National Mortgage Association