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INCOME TAXES - Components of Net Deferred Tax Asset (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Deferred tax assets:    
Allowance for loan losses $ 4,719 $ 4,725
Deferred compensation 548 545
Retirement plans and salary continuation 2,018 1,942
Share-based compensation 730 583
Off-balance sheet reserves 337 313
Nonaccrual loan interest 466 370
Net unrealized losses on securities available for sale 0 600
Goodwill 77 92
Bonus accrual 321 236
Low-income housing credit carryforward 2,148 1,983
Alternative minimum tax credit carryforward 4,348 4,048
Net operating loss carryforward 804 2,520
Other 523 479
Total deferred tax assets 17,039 18,436
Deferred tax liabilities:    
Depreciation 694 771
Net unrealized gains on securities available for sale 1,472 0
Mortgage servicing rights 814 777
Purchase accounting adjustments 420 435
Other 198 195
Total deferred tax liabilities 3,598 2,178
Net deferred tax asset $ 13,441 $ 16,258