Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Accumulated Other Comprehensive Income
Balance at the beginning of the period	$ (381)
Other comprehensive income before reclassifications	889
Net current period other comprehensive income	889
Balance at the end of the period	508
Cash flow hedge
Accumulated Other Comprehensive Income
Balance at the beginning of the period	(476)
Other comprehensive income before reclassifications	1,161
Net current period other comprehensive income	1,161
Balance at the end of the period	685
Foreign Currency
Accumulated Other Comprehensive Income
Balance at the beginning of the period	95
Other comprehensive income before reclassifications	(272)
Net current period other comprehensive income	(272)
Balance at the end of the period	$ (177)