Income Taxes - Reconciliation of the Beginning and Ending Uncertain Tax Positions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits, Beginning balance	$ 2,678	$ 2,526
Increases in tax positions for prior years		152
Decreases in tax positions for prior years
Increases in tax positions for current year	132
Settlements
Lapse in statute of limitations	(47)
Gross unrecognized tax benefits, Ending balance	$ 2,763	$ 2,678