Stockholder's Equity (Details 2) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	$ (4,187,000)	$ (5,059,000)	$ (6,014,000)	$ (6,957,000)
Unrecognized losses on equity investments	0	(389,000)	(302,000)	(216,000)
Unrecognized gains (losses) on foreign currency translation	(13,003,000)	(17,631,000)	(39,884,000)	(881,000)
Unrecognized actuarial losses	(1,452,000)	(1,452,000)	(2,974,000)	(2,974,000)
Totals	(18,642,000)	(24,531,000)	(49,174,000)	(11,028,000)
Other comprehensive income before reclassification adjustments
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	(7,000)		(8,000)
Unrecognized losses on equity investments	389,000		(86,000)
Unrecognized gains (losses) on foreign currency translation	4,628,000		(39,003,000)
Unrecognized actuarial losses	0		0
Totals	5,010,000		(39,097,000)
Reclassification amount to net income
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	879,000		951,000
Unrecognized losses on equity investments	0		0
Unrecognized gains (losses) on foreign currency translation	0		0
Unrecognized actuarial losses	0		0
Totals	879,000		951,000
Net current period other comprehensive income
Summary of accumulated other comprehensive income/(loss)
Unrecognized losses on cash flow hedges	872,000		943,000
Unrecognized losses on equity investments	389,000		(86,000)
Unrecognized gains (losses) on foreign currency translation	4,628,000		(39,003,000)
Unrecognized actuarial losses	0		0
Totals	$ 5,889,000		$ (38,146,000)