Income Taxes - Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning Balance
Additions to current year tax positions	43
Additions to tax positions of prior years	241
Reductions for tax provisions of prior years
Ending Balance	$ 284