Stockholder's Equity (Details 2) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	$ (4,619,000)	$ (5,059,000)	$ (6,486,000)	$ (6,957,000)
Unrecognized losses on equity investments	160,000	(389,000)	(44,000)	(216,000)
Unrecognized gains (losses) on foreign currency translation	(19,508,000)	(17,631,000)	(23,587,000)	(881,000)
Unrecognized actuarial losses	(1,452,000)	(1,452,000)	(2,974,000)	(2,974,000)
Totals	(25,419,000)	(24,531,000)	(33,091,000)	(11,028,000)
Other comprehensive income before reclassification adjustments
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	(3,000)		(4,000)
Unrecognized losses on equity investments	549,000		172,000
Unrecognized gains (losses) on foreign currency translation	(1,877,000)		(22,706,000)
Unrecognized actuarial losses	0		0
Totals	(1,331,000)		(22,538,000)
Reclassification amount to net income
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	443,000		475,000
Unrecognized losses on equity investments	0		0
Unrecognized gains (losses) on foreign currency translation	0		0
Unrecognized actuarial losses	0		0
Totals	443,000		475,000
Net current period other comprehensive income
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	440,000		471,000
Unrecognized losses on equity investments	549,000		172,000
Unrecognized gains (losses) on foreign currency translation	(1,877,000)		(22,706,000)
Unrecognized actuarial losses	0		0
Totals	$ (888,000)		$ (22,063,000)