Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current income taxes:
Domestic	$ 7,825	$ 15,487	$ 10,130
Foreign	3,615	468	788
Total current	11,440	15,955	10,918
Deferred income taxes:
Domestic	(3,084)	(2,710)	14,075
Foreign	(44)	(351)	719
Valuation allowance	666	1,393	(1,171)
Total deferred	(2,462)	(1,668)	13,623
Total income taxes (benefit)	$ 8,978	$ 14,287	$ 24,541