Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Additional Information (Detail)

v3.7.0.1
Accumulated Other Comprehensive Income - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accumulated Other Comprehensive Income [Line Items]    
Net gain on sales of securities $ 269 $ 0
Net unrealized gains (losses) recorded in comprehensive income 319  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]    
Accumulated Other Comprehensive Income [Line Items]    
Net gain on sales of securities $ 269