Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2014 Accumulated Translation Adjustment [Member]	Jun. 30, 2013 Accumulated Translation Adjustment [Member]	Jun. 30, 2014 Accumulated Translation Adjustment [Member]	Jun. 30, 2013 Accumulated Translation Adjustment [Member]	Jun. 30, 2014 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Jun. 30, 2013 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Jun. 30, 2014 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	Jun. 30, 2013 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (8,606)	$ (9,341)	$ (14,716)	$ (9,223)	$ (13,759)	$ (9,129)	$ (8,418)	$ (194)	$ (288)	$ (212)	$ (306)
Unrealized gain (loss)				786	(744)	692	(6,085)	(14)	45	(34)	35
Reclassified to interest expense								65	50	128	96
Income tax expense								(26)	(20)	(51)	(38)
Accumulated other comprehensive income (loss) at June 30,	$ (8,606)	$ (9,341)	$ (14,716)	$ (8,437)	$ (14,503)	$ (8,437)	$ (14,503)	$ (169)	$ (213)	$ (169)	$ (213)