Stockholder's Equity (Details 2) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		$ (45)	$ (1,416)	$ (1,885)	$ (650)
Unrecognized losses on equity investments		(5,252)	0	(18,186)	0
Unrecognized gains (losses) on foreign currency translation		(144,544)	(85,484)	(72,699)	(74,770)
Unrecognized actuarial losses		(1,343)	(1,343)	(1,589)	(1,589)
Totals		(151,184)	$ (88,243)	(94,359)	$ (77,009)
Other comprehensive income before reclassification adjustments
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		11		(2,625)
Unrecognized losses on equity investments		(5,252)		(18,186)
Unrecognized gains (losses) on foreign currency translation		(59,060)		2,071
Unrecognized actuarial losses		0		0
Totals		(64,301)		(18,740)
Reclassification amount to net income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges	[1]	1,360		1,390
Unrecognized losses on equity investments		0		0
Unrecognized gains (losses) on foreign currency translation		0		0
Unrecognized actuarial losses		0		0
Totals		1,360		1,390
Net current period other comprehensive income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		1,371		(1,235)
Unrecognized losses on equity investments		(5,252)		(18,186)
Unrecognized gains (losses) on foreign currency translation		(59,060)		2,071
Unrecognized actuarial losses		0		0
Totals		$ (62,941)		$ (17,350)

[1] (1) Please see Note 11 for additional information.