XML 55 R43.htm IDEA: XBRL DOCUMENT v3.4.0.3
Securities Available for Sale and Held to Maturity - Amortized Cost and Estimated Fair Value of Available for Sale and Held to Maturity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost $ 2,326,607 $ 2,339,562
Securities Available for Sale, Gross Unrealized Gains 43,934 20,164
Securities Available for Sale, Gross Unrealized (Losses) (2,421) (14,304)
Securities Available for Sale, Estimated Fair Value 2,368,120 2,345,422
Securities Held to Maturity, Amortized Cost 1,168,203 1,187,818
Securities Held to Maturity, Gross Unrealized Gains 31,267 13,504
Securities Held to Maturity, Gross Unrealized (Losses) (257) (5,955)
Securities Held to Maturity, Estimated Fair Value 1,199,213 1,195,367
U.S. Government Agency Obligations Issued by U.S. Government Agencies [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 63,787 68,314
Securities Available for Sale, Gross Unrealized Gains 522 555
Securities Available for Sale, Gross Unrealized (Losses) (495) (734)
Securities Available for Sale, Estimated Fair Value 63,814 68,135
Securities Held to Maturity, Amortized Cost 0 0
Securities Held to Maturity, Gross Unrealized Gains 0 0
Securities Held to Maturity, Gross Unrealized (Losses) 0 0
Securities Held to Maturity, Estimated Fair Value 0 0
U.S. Government Agency Obligations Issued by U.S. Government Sponsored Agencies [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 258 258
Securities Available for Sale, Gross Unrealized Gains 28 23
Securities Available for Sale, Gross Unrealized (Losses) 0 0
Securities Available for Sale, Estimated Fair Value 286 281
Securities Held to Maturity, Amortized Cost 63,085 101,782
Securities Held to Maturity, Gross Unrealized Gains 3,437 3,282
Securities Held to Maturity, Gross Unrealized (Losses) 0 0
Securities Held to Maturity, Estimated Fair Value 66,522 105,064
Obligations of States and Political Subdivisions [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 131,464 134,719
Securities Available for Sale, Gross Unrealized Gains 4,197 3,922
Securities Available for Sale, Gross Unrealized (Losses) (6) (32)
Securities Available for Sale, Estimated Fair Value 135,655 138,609
Securities Held to Maturity, Amortized Cost 54,278 55,892
Securities Held to Maturity, Gross Unrealized Gains 3,116 2,918
Securities Held to Maturity, Gross Unrealized (Losses) 0 0
Securities Held to Maturity, Estimated Fair Value 57,394 58,810
Residential Mortgage Pass-Through Securities Guaranteed by GNMA [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 24,582 25,602
Securities Available for Sale, Gross Unrealized Gains 521 399
Securities Available for Sale, Gross Unrealized (Losses) (22) (189)
Securities Available for Sale, Estimated Fair Value 25,081 25,812
Securities Held to Maturity, Amortized Cost 16,590 17,363
Securities Held to Maturity, Gross Unrealized Gains 533 342
Securities Held to Maturity, Gross Unrealized (Losses) 0 (49)
Securities Held to Maturity, Estimated Fair Value 17,123 17,656
Residential Mortgage Pass-Through Securities Issued by FNMA and FHLMC [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 324,841 222,899
Securities Available for Sale, Gross Unrealized Gains 5,719 2,956
Securities Available for Sale, Gross Unrealized (Losses) (2) (313)
Securities Available for Sale, Estimated Fair Value 330,558 225,542
Securities Held to Maturity, Amortized Cost 9,871 10,368
Securities Held to Maturity, Gross Unrealized Gains 502 311
Securities Held to Maturity, Gross Unrealized (Losses) 0 0
Securities Held to Maturity, Estimated Fair Value 10,373 10,679
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 1,515,862 1,584,338
Securities Available for Sale, Gross Unrealized Gains 26,501 9,541
Securities Available for Sale, Gross Unrealized (Losses) (1,822) (11,019)
Securities Available for Sale, Estimated Fair Value 1,540,541 1,582,860
Securities Held to Maturity, Amortized Cost 818,201 820,012
Securities Held to Maturity, Gross Unrealized Gains 17,752 4,951
Securities Held to Maturity, Gross Unrealized (Losses) (116) (4,742)
Securities Held to Maturity, Estimated Fair Value 835,837 820,221
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost 265,813 278,429
Securities Available for Sale, Gross Unrealized Gains 6,446 2,689
Securities Available for Sale, Gross Unrealized (Losses) (74) (1,892)
Securities Available for Sale, Estimated Fair Value 272,185 279,226
Securities Held to Maturity, Amortized Cost 206,178 182,401
Securities Held to Maturity, Gross Unrealized Gains 5,927 1,700
Securities Held to Maturity, Gross Unrealized (Losses) (141) (1,164)
Securities Held to Maturity, Estimated Fair Value $ 211,964 182,937
Asset-Backed Securities and Structured Financial Products [Member]    
Schedule of Available For Sale and Held to Maturity Securities [Line Items]    
Securities Available for Sale, Amortized Cost   25,003
Securities Available for Sale, Gross Unrealized Gains   79
Securities Available for Sale, Gross Unrealized (Losses)   (125)
Securities Available for Sale, Estimated Fair Value   24,957
Securities Held to Maturity, Amortized Cost   0
Securities Held to Maturity, Gross Unrealized Gains   0
Securities Held to Maturity, Gross Unrealized (Losses)   0
Securities Held to Maturity, Estimated Fair Value   $ 0