Income Taxes (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 17, 2015	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Income tax expense (benefit)			$ (4,830)	$ 317	$ (12,328)	$ (5,709)
Term of cumulative pretax net losses					3 years
Term of improvement in book income					5 years
FTC contempt action | Settled litigation
Income Tax Contingency [Line Items]
Payments for legal settlements	$ 100,000	$ 100,000
Loss contingency, cumulative accrual		$ 16,000
Settlement amount							$ 116,000
Legal reserve
Income Tax Contingency [Line Items]
Reserves							$ 96,000	$ 20,000