Income Taxes (Effective Tax Rate) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Benefit (provision) for income taxes at statutory rate									$ (135,847,000)		$ (102,385,000)		$ (35,289,000)
Tax effect of foreign income (losses)									14,277,000		11,258,000		8,251,000
Tax adjustment related to REIT operations									132,951,000		0		0
Tax adjustment related to the REIT conversion									0	[1]	(67,395,000)	[1]	0	[1]
Expenses for which no federal tax benefit was recognized									(463,000)		(9,570,000)		(3,874,000)
Valuation allowances									9,000,000		0		95,072,000
State tax (provision) benefit, net of federal									(3,136,000)		(14,852,000)		(1,097,000)
Foreign tax									(7,836,000)		(12,868,000)		35,877,000
Other									1,694,000		(2,816,000)		1,121,000
Total benefit (provision) for income taxes	110,374,000	[2]	33,959,000	[2]	36,587,000	[2]	17,708,000	[2]	10,640,000		(198,628,000)		100,061,000
REIT tax adjustment to reclassify a deferred tax charge from AOCI											39,800,000
Capital Loss Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowances											$ (29,400,000)

[1] Inclusive of a $39.8 million adjustment during the year ended December 31, 2013 to reclassify a deferred tax charge from AOCI to the provision for income taxes.

[2] Inclusive of the tax adjustment related to the REIT election of 67.4 million. See also note 10.