Stockholder's Equity (Details 2) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		$ (446)	$ (1,416)	$ (2,347)	$ (650)
Unrecognized losses on equity investments		(11,160)	0	(15,100)	0
Unrecognized gains (losses) on foreign currency translation		(146,691)	(85,484)	(62,634)	(74,770)
Unrecognized actuarial losses		(1,341)	(1,343)	(1,589)	(1,589)
Totals		(159,638)	$ (88,243)	(81,670)	$ (77,009)
Other comprehensive income before reclassification adjustments
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		10		(2,625)
Unrecognized losses on equity investments		(11,160)		(15,100)
Unrecognized gains (losses) on foreign currency translation		(61,207)		12,136
Unrecognized actuarial losses		2		0
Totals		(72,355)		(5,589)
Reclassification amount to net income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges	[1]	960		928
Unrecognized losses on equity investments		0		0
Unrecognized gains (losses) on foreign currency translation		0		0
Unrecognized actuarial losses		0		0
Totals		960		928
Net current period other comprehensive income
Summary of accumulated other comprehensive income/(loss) [Line Items]
Unrecognized losses on cash flow hedges		970		(1,697)
Unrecognized losses on equity investments		(11,160)		(15,100)
Unrecognized gains (losses) on foreign currency translation		(61,207)		12,136
Unrecognized actuarial losses		2		0
Totals		$ (71,395)		$ (4,661)

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