XML 89 R75.htm IDEA: XBRL DOCUMENT v3.3.1.900
Employee and Director Benefit Plans - Summary of Change in Plan Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Postemployment Benefits [Abstract]      
Fair value of plan assets at beginning of year $ 0    
Actual return on assets      
Employer contribution 37 $ 64 $ 90
Benefits paid, net (37) (64) $ (90)
Fair value of plan assets at end of year $ 0 $ 0