Stockholder's Equity (Details 4) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized gains (losses) on cash flow hedges		$ (1,416)	$ (650)	$ (5,059)
Unrecognized gains (losses) on equity investments		0	0	(389)
Unrecognized gains (losses) on foreign currency translation		(85,484)	(74,770)	(17,631)
Unrecognized actuarial losses		(1,343)	(1,589)	(1,452)
Totals		(88,243)	(77,009)	$ (24,531)
Other comprehensive income before reclassification adjustments
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized gains (losses) on cash flow hedges		(2,626)	2,610
Unrecognized gains (losses) on equity investments		0	389
Unrecognized gains (losses) on foreign currency translation		(10,714)	(56,611)
Unrecognized actuarial losses		246	(137)
Totals		(13,094)	(53,749)
Reclassification amount to net income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized gains (losses) on cash flow hedges	[1]	1,860	1,799
Unrecognized gains (losses) on equity investments		0	0
Unrecognized gains (losses) on foreign currency translation		0	(528)
Unrecognized actuarial losses		0	0
Totals		1,860	1,271
Net current period other comprehensive income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized gains (losses) on cash flow hedges		(766)	4,409
Unrecognized gains (losses) on equity investments		0	389
Unrecognized gains (losses) on foreign currency translation		(10,714)	(57,139)
Unrecognized actuarial losses		246	(137)
Totals		$ (11,234)	$ (52,478)

[1] Please see Note 11 for additional information.