Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Current:
State	$ 123	$ 130	$ 448	$ 379
Foreign	561		1,943
Current tax	684	130	2,391	379
Deferred:
Foreign	101	1,192	136	1,527
Deferred tax	101	1,192	136	1,527
Income tax provision	785	1,322	2,527	1,906
Deferred tax assets	1,926		1,926		2,329
Deferred tax liabilities	3,242		3,242		3,643
Valuation allowance	$ 536		$ 536		$ 598