Schedule I Financial Information (As Restated) Schedule I - Financial Information - Schedule of Restatements to Parent Company Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Investments in consolidated subsidiaries and VIEs	$ 0	$ 0
Total assets	16,458,970	18,549,447
Accumulated deficit	(621,804)	212,054
Total stockholders' equity (deficit)	(24,440)	804,676	$ 1,076,659	$ 1,167,016
Total liabilities and stockholders' equity (deficit)	16,458,970	18,549,447
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total assets	16,758,896
Accumulated deficit	(317,104)
Total stockholders' equity (deficit)	280,260
Total liabilities and stockholders' equity (deficit)	16,758,896
Deferred Tax Asset Valuation Allowance Adjustments [Member] | Restatement Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total assets	(299,926)
Accumulated deficit	(304,700)
Total stockholders' equity (deficit)	(304,700)
Total liabilities and stockholders' equity (deficit)	(299,926)
Reportable Legal Entities [Member] | Parent Company [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets, net	0
Investments in consolidated subsidiaries and VIEs	1,620,339	2,278,009
Total assets	2,157,897	3,031,554
Accumulated deficit	(621,804)	212,054
Total stockholders' equity (deficit)	(24,440)	804,676
Total liabilities and stockholders' equity (deficit)	2,157,897	$ 3,031,554
Reportable Legal Entities [Member] | Parent Company [Member] | As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets, net	27,310
Investments in consolidated subsidiaries and VIEs	1,897,729
Total assets	2,462,597
Accumulated deficit	(317,104)
Total stockholders' equity (deficit)	280,260
Total liabilities and stockholders' equity (deficit)	2,462,597
Reportable Legal Entities [Member] | Parent Company [Member] | Deferred Tax Asset Valuation Allowance Adjustments [Member] | Restatement Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets, net	(27,310)
Investments in consolidated subsidiaries and VIEs	(277,390)
Total assets	(304,700)
Accumulated deficit	(304,700)
Total stockholders' equity (deficit)	(304,700)
Total liabilities and stockholders' equity (deficit)	$ (304,700)