Income Taxes - Reconciliation of Unrecognized Tax Benefits - (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Tax
Balance	$ 127,085	$ 5,903	$ 5,903
Additions for current year tax positions	199	117
Additions for Reorganization Transactions			121,400
Reductions for prior years' tax positions: Expiration of statute of limitations	(127)	(176)
Balance	127,157	5,844	127,085
Interest and Penalties
Balance	9,965	2,935	2,935
Additions for Reorganization Transactions			7,000
Additions for prior years' tax positions: Accrual of interest and penalties	71	32
Reductions for prior years' tax positions: Expiration of statute of limitations	(51)	(72)
Balance	9,985	2,895	9,965
Total
Balance	137,050	8,838	8,838
Additions for current year tax positions	199	117
Additions for prior years' tax positions: Accrual of interest and penalties	71	32
Reductions for prior years' tax positions: Expiration of statute of limitations	(178)	(248)
Balance	137,142	8,739	137,050
Unrecognized tax benefits
Amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate	10,700	6,500
Unrecognized tax benefits attributable to tax refund claims in State of California	93,900
Unrecognized tax benefits, reasonably possible to decrease within the next 12 months	107,100
Unrecognized interest and penalties, reasonably possible to decrease within the next 12 months	5,100
Net expense attributable to interest and penalties recorded	0	$ 100
Accrued interest and penalties attributable to uncertain tax positions and undisputed tax adjustments	12,100		12,100
Accrued interest and penalties attributable to unrecognized tax benefits	$ 10,000		$ 10,000