XML 101 R51.htm IDEA: XBRL DOCUMENT v3.19.3
Investment Securities - Unrealized Losses and Fair Value Available for Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Fair Value    
Less than Twelve Months $ 145,962 $ 156,682
More than Twelve Months 331,582 1,456,424
Total 477,544 1,613,106
Unrealized Losses    
Less than Twelve Months (305) (1,050)
More than Twelve Months (3,616) (47,805)
Total (3,921) (48,855)
U.S. Treasury securities    
Fair Value    
Less than Twelve Months 25,940 0
More than Twelve Months 0 49,306
Total 25,940 49,306
Unrealized Losses    
Less than Twelve Months (9) 0
More than Twelve Months 0 (1,669)
Total (9) (1,669)
U.S. government agency securities    
Fair Value    
Less than Twelve Months 0 2,120
More than Twelve Months 2,131 26,775
Total 2,131 28,895
Unrealized Losses    
Less than Twelve Months 0 (20)
More than Twelve Months (21) (618)
Total (21) (638)
Obligations of states and state agencies    
Fair Value    
Less than Twelve Months 21,181 17,560
More than Twelve Months 10,270 75,718
Total 31,451 93,278
Unrealized Losses    
Less than Twelve Months (11) (95)
More than Twelve Months (72) (3,587)
Total (83) (3,682)
Municipal bonds    
Fair Value    
Less than Twelve Months 2,226 5,018
More than Twelve Months 15,301 70,286
Total 17,527 75,304
Unrealized Losses    
Less than Twelve Months (29) (106)
More than Twelve Months (125) (1,331)
Total (154) (1,437)
Obligations of states and political subdivisions    
Fair Value    
Less than Twelve Months 23,407 22,578
More than Twelve Months 25,571 146,004
Total 48,978 168,582
Unrealized Losses    
Less than Twelve Months (40) (201)
More than Twelve Months (197) (4,918)
Total (237) (5,119)
Residential mortgage-backed securities    
Fair Value    
Less than Twelve Months 96,615 119,645
More than Twelve Months 303,880 1,221,942
Total 400,495 1,341,587
Unrealized Losses    
Less than Twelve Months (256) (668)
More than Twelve Months (3,398) (40,093)
Total $ (3,654) (40,761)
Corporate and other debt securities    
Fair Value    
Less than Twelve Months   12,339
More than Twelve Months   12,397
Total   24,736
Unrealized Losses    
Less than Twelve Months   (161)
More than Twelve Months   (507)
Total   $ (668)