XML 115 R100.htm IDEA: XBRL DOCUMENT v3.8.0.1
Accumulated Other Comprehensive Loss - Schedule of Changes in Component of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 52,151 $ 45,953
Unrealized holding losses, net of tax (82) (663)
Reclassification adjustment, net of tax 59 (5)
Pension liability adjustment, net of tax 83 1,396
Reclassification of tax effects stranded in accumulated other comprehensive loss by tax rate change 0  
Total other comprehensive income 60 728
Ending balance 58,154 52,151
Unrealized holding losses, tax (43) (341)
Reclassification adjustment, tax 31 (3)
Pension liability adjustment, tax 43 719
Net Unrealized Losses on Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (860) (192)
Unrealized holding losses, net of tax (82) (663)
Reclassification adjustment, net of tax 59 (5)
Pension liability adjustment, net of tax 0 0
Reclassification of tax effects stranded in accumulated other comprehensive loss by tax rate change (174)  
Total other comprehensive income (197) (668)
Ending balance (1,057) (860)
Adjustments Related to Pension Benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 0 (1,396)
Unrealized holding losses, net of tax 0 0
Reclassification adjustment, net of tax 0 0
Pension liability adjustment, net of tax 83 1,396
Reclassification of tax effects stranded in accumulated other comprehensive loss by tax rate change 16  
Total other comprehensive income 99 1,396
Ending balance 99 0
Accumulated Other Comprehensive Loss    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (860) (1,588)
Unrealized holding losses, net of tax (82) (663)
Reclassification adjustment, net of tax 59 (5)
Pension liability adjustment, net of tax 83 1,396
Reclassification of tax effects stranded in accumulated other comprehensive loss by tax rate change (158)  
Total other comprehensive income (98) 728
Ending balance $ (958) $ (860)