XML 121 R108.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Income Tax (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Contingency [Line Items]                      
Current Federal Tax Expense (Benefit)                 $ 40,471 $ 33,400 $ 39,708
Federal operating loss carryforwards, set to begin to expire in 2024 $ 15,800               15,800    
Idaho state operating loss carryforwards, set to begin to expire in 2024 14,300               14,300    
Interest and penalties on unrecognized tax benefits                 0 0  
State operating loss carryforwards, set to begin to expire in 2024 121               121    
Unrecognized tax position 0       $ 0       0 0  
Current State and Local Tax Expense (Benefit)                 6,359 5,446 3,016
Current tax (benefit) expense                 46,830 38,846 42,724
Deferred Federal Income Tax Expense (Benefit)                 60 (291) 21,524
Deferred State and Local Income Tax Expense (Benefit)                 270 399 907
Deferred tax expense (benefit)                 330 108 22,431
Income tax provision 11,903 $ 12,378 $ 12,094 $ 10,785 10,734 $ 11,406 $ 9,999 $ 6,815 47,160 38,954 65,155
Deferred tax assets:                      
Allowance for loan and lease losses 20,489       20,578       20,489 20,578  
Deferred Tax Assets, Leasing Arrangements 14,776       0       14,776 0  
Supplemental executive retirement plan 11,079       9,501       11,079 9,501  
Stock option and restricted stock 2,016       1,850       2,016 1,850  
OREO 0       288       0 288  
Nonaccrual interest 112       446       112 446  
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross 0       10,129       0 10,129  
Deferred Tax Assets, Operating Loss Carryforwards 4,136       5,356       4,136 5,356  
Other (245)       (733)       (245) (733)  
Total deferred tax assets 52,853       48,881       52,853 48,881  
Deferred tax liabilities:                      
Asset purchase tax basis difference (7,888)       (7,229)       (7,888) (7,229)  
Deferred Tax Liabilities, Leasing Arrangements (13,415)       0       (13,415) 0  
FHLB stock dividends (789)       (790)       (789) (790)  
Deferred loan fees (4,097)       (4,399)       (4,097) (4,399)  
deferred tax liabilities, unrealized gains on available-for-sale securities 10,091       0       10,091 0  
Deferred tax liabilities, purchase accounting (8,946)       (9,245)       (8,946) (9,245)  
Depreciation (3,152)       (2,609)       (3,152) (2,609)  
Deferred Tax Liabilities, Derivatives (3,452)       0       (3,452) 0  
Deferred Tax Liabilities, Other (100)       (195)       (100) (195)  
Total deferred tax liabilities 51,930       24,467       51,930 24,467  
Net deferred tax (liability) asset 923       24,414       923 24,414  
Reconciliation of effective income tax rate with federal statutory tax rate                      
Income tax based on statutory rate                 $ 50,738 $ 44,485 $ 62,262
Income tax based on statutory rate, percent                 21.00% 21.00% 35.00%
Federal income tax rate 2018                 21.00%    
Tax exempt instrument                 $ (6,771) $ (6,423) $ (8,485)
Tax exempt instrument, percent                 (3.00%) (3.00%) (5.00%)
Life insurance proceeds                 $ (1,963) $ (1,261) $ (3,351)
Life insurance proceeds, percent                 (1.00%) (1.00%) (2.00%)
effective income tax rate reconciliation, nondeductible expense, business combination, amount                 $ 0 $ 0 $ 825
effective income tax rate reconciliation, nondeductible expense, business combination, percent                 0.00% 0.00% 1.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount                 $ 0 $ 0 $ 12,210
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent                 0.00% 0.00% 7.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount                 $ 5,134 $ 4,931 $ 2,550
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent                 2.00% 2.00% 1.00%
Other, net                 $ 22 $ (2,778) $ (856)
Other, net, percent                 1.00% (1.00%) 0.00%
Income tax provision $ 11,903 $ 12,378 $ 12,094 $ 10,785 $ 10,734 $ 11,406 $ 9,999 $ 6,815 $ 47,160 $ 38,954 $ 65,155
Income tax provision (benefit), percent                 20.00% 18.00% 37.00%