Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income
Balance at the beginning of the period	$ (381)	$ (318)	$ 103
Change in other comprehensive income (loss)	499	(63)	(421)
Balance at the end of the period	118	(381)	(318)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income
Balance at the beginning of the period	95	93	483
Change in other comprehensive income (loss)	(463)	2	(390)
Balance at the end of the period	(368)	95	93
Effective Portion of Unrealized Gain (Loss) on Derivative
Accumulated Other Comprehensive Income
Balance at the beginning of the period	(476)	(411)	(380)
Change in other comprehensive income (loss)	962	(65)	(31)
Balance at the end of the period	$ 486	$ (476)	$ (411)