Income Taxes - Summary of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Beginning balance	$ 873	$ 988	$ 953
Additions for tax positions of prior years		428	35
Reductions for tax positions of prior years		(543)
Ending balance	$ 873	$ 873	$ 988