Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income
Net income	$ 4,927	$ 3,369
Other comprehensive income (loss):
Foreign currency translation adjustment	(1,745)	(1,202)
Unrealized derivative gain on cash flow hedges (net of tax expense of $-, $5)		9
Reclassification of unrealized derivative gain on cash flow hedges to earnings (net of tax expense of: $5, $-)	(9)
Total other comprehensive income (loss), net of tax:	(1,754)	(1,193)
Comprehensive income	$ 3,173	$ 2,176