Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 3,208	$ 1,534	$ (1,422)
State	265	15	(24)
Foreign	2,352	3,623	1,921
Total Current	5,825	5,172	475
Deferred:
Federal	(2,031)	503	(1,209)
State	(291)	108	666
Foreign	673	572	940
Total Deferred	(1,649)	1,183	397
Provision for income taxes	$ 4,176	$ 6,355	$ 872