XML 131 R114.htm IDEA: XBRL DOCUMENT v3.20.4
Accumulated Other Comprehensive Income (Loss) - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Debt securities gains (losses), net                 $ 10,767 $ 1,923 $ 2,060
Income tax (expense) benefit $ (4,293) $ (12,154) $ (9,761) $ (2,939) $ (11,433) $ (13,254) $ (14,359) $ (13,104) (29,147) (52,150) (17,850)
Interest income (expense) 161,079 145,573 145,671 143,771 148,899 153,096 155,230 147,048 596,094 604,273 537,602
Salaries and employee benefits                 (293,590) (289,452) (281,275)
Net income $ 74,120 $ 77,944 $ 51,705 $ 22,640 $ 49,185 $ 69,781 $ 62,964 $ 56,276 226,409 238,206 190,830
Amount Reclassified from AOCI                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net income                 12,262 (184) (273)
Amount Reclassified from AOCI | Unrealized Gains and Losses on Available- for-Sale Debt Securities                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Debt securities gains (losses), net                 10,767 1,923 2,060
Income tax (expense) benefit                 (2,375) (438) (398)
Net income                 8,392 1,485 1,662
Amount Reclassified from AOCI | Unrealized Gains and Losses on Held-to- Maturity Securities                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income tax (expense) benefit                 0 716 503
Interest income (expense)                 0 (2,812) (2,181)
Net income                 0 (2,096) (1,678)
Amount Reclassified from AOCI | Gains and Losses on Cash Flow Hedges | Interest rate contracts                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income tax (expense) benefit                 (1,267) (147) 37
Interest income (expense)                 5,153 596 (150)
Net income                 3,886 449 (113)
Amount Reclassified from AOCI | Defined Benefit Pension Plans                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income tax (expense) benefit                 5 8 47
Salaries and employee benefits                 (21) (30) (191)
Net income                 $ (16) $ (22) $ (144)