Other Comprehensive Income - Summary of Other Comprehensive Income and Tax Impact (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Net unrealized (loss) gain on available-for-sale securities, net of income tax (benefit) expense of ($11) and $26, respectively	$ (33)	$ 41
Net unrealized gain on interest rate swaps, net of income tax expense of $33 and $39, respectively	56	65
Foreign currency translation	(14)	(14)
Total other comprehensive income	$ 9	$ 92