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Other Comprehensive Income (Loss) - Summary of Other Comprehensive Income (Loss) and Tax Impact (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]        
Net unrealized gain (loss) on available-for-sale securities, net of income taxes $ 31 $ (95) $ 24 $ (86)
Net unrealized gain on interest rate swaps, net of income taxes   44 79 161
Foreign currency translation (15) (15) (41) (44)
Total other comprehensive income (loss) $ 16 $ (66) $ 62 $ 31