General (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Components of accumulated other comprehensive loss (AOCL), net of tax
Balance at beginning of period	$ (1,655)
Other comprehensive income (loss) before reclassifications	(1,542)
Amounts reclassified out of AOCL	(141)
Net current period activity	(1,683)
Balance at end of period	(3,338)
Foreign Currency Translation
Components of accumulated other comprehensive loss (AOCL), net of tax
Balance at beginning of period	(2,024)
Other comprehensive income (loss) before reclassifications	(1,722)
Net current period activity	(1,722)
Balance at end of period	(3,746)
Unrealized Gain on Foreign Currency Derivatives
Components of accumulated other comprehensive loss (AOCL), net of tax
Balance at beginning of period	373
Other comprehensive income (loss) before reclassifications	94
Amounts reclassified out of AOCL	(141)
Net current period activity	(47)
Balance at end of period	326
Unrealized Gain (Loss) on Available for Sale Securities
Components of accumulated other comprehensive loss (AOCL), net of tax
Balance at beginning of period	(4)
Other comprehensive income (loss) before reclassifications	86
Net current period activity	86
Balance at end of period	$ 82