Income Taxes (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 07, 2011
Income tax disclosure
Income (loss) before income taxes	$ (601,744,000)	$ 134,894,000	$ 151,184,000	$ (251,181,000)	$ 222,771,000	$ 240,946,000	$ 208,926,000	$ 220,795,000	$ (566,847,000)	$ 893,438,000	$ 852,015,000
Current
Federal									4,948,000	1,833,000	130,000
State									2,784,000	2,773,000	2,195,000
Foreign									828,000	223,000
Total current									8,560,000	4,829,000	2,325,000
Deferred
Federal									(11,317,000)	(3,278,000)	3,045,000
State									(1,382,000)	(347,000)	445,000
Foreign									(4,872,000)	(954,000)
Total deferred									(17,571,000)	(4,579,000)	3,490,000
Total income tax (benefit) expense									(9,011,000)	250,000	5,815,000
Reconciliation of the income tax expense at statutory rates to the actual income tax expense recorded
Tax (benefit) expense at U.S. federal statutory income tax rate on income or loss subject to tax									(12,630,000)	(2,131,000)	3,582,000
State income tax expense, net of federal tax									93,000	764,000	928,000
Gross receipts and margin taxes									1,480,000	1,699,000	1,553,000
Foreign rate differential									2,269,000	554,000
Effect of permanent differences									(298,000)	(196,000)	(221,000)
Return to provision adjustments									(368,000)	(528,000)	(27,000)
Increase in valuation allowance									443,000	88,000
Total income tax (benefit) expense									(9,011,000)	250,000	5,815,000
The significant components of the Company’s deferred tax assets and liabilities
Investments and property, primarily differences in investment basis, depreciation and amortization, the basis of land assets, and the treatment of interests and certain costs												$ 19,862,000	$ 3,418,000	$ 707,000
Net operating loss carryforward												3,703,000	484,000	749,000
Expense accruals and other												(753,000)	462,000	(4,000)
Valuation allowance												(531,000)	(88,000)
Net deferred tax assets												22,281,000	4,276,000	1,452,000
Deferred income tax expense (benefit)									(17,571,000)	(4,579,000)	3,490,000
Amount that tax basis of net assets is less than reported amounts												6,500,000,000
U.K. income tax benefit									(828,000)	(223,000)
State									2,784,000	2,773,000	2,195,000
Federal									4,948,000	1,833,000	130,000
Unrecognized tax benefits	0			0	0				0	0		0	$ 0
Reconciliation of unrecognized tax benefits
Balance at the beginning of the year				$ 0					0
Balance at the end of the year	$ 0				$ 0				0	0
UNITED KINGDOM
Income tax disclosure
Income (loss) before income taxes									(15,000,000)	4,000,000
TRS
Income tax disclosure
Income (loss) before income taxes									22,000,000	2,000,000	10,000,000
The significant components of the Company’s deferred tax assets and liabilities
Net operating loss carryforward												$ 10,000,000
SEUSA
The significant components of the Company’s deferred tax assets and liabilities
Unrecognized tax benefits								1,087,000		1,087,000	1,977,000			$ 1,087,000
Reconciliation of unrecognized tax benefits
Balance at the beginning of the year								$ 1,087,000		1,087,000	1,977,000
Reductions based on prior years' tax positions										(1,087,000)	(890,000)
Balance at the end of the year											$ 1,087,000
HCRMC
The significant components of the Company’s deferred tax assets and liabilities
Decrease in unrecognized tax benefits due to lapse in the statute of limitations									$ 1,000,000	$ 1,000,000
Unrecognized tax benefits															$ 2,000,000