Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Additional Information (Detail)

v3.5.0.2
Accumulated Other Comprehensive Income - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Accumulated Other Comprehensive Income [Line Items]        
Net gain on sales of securities $ 46 $ 2,048 $ 46 $ 6,144
Net unrealized gains (losses) recorded in comprehensive income 321 1,200 (314) 2,000
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 $ 46 $ 2,000 $ 46 $ 6,100