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Share and Incentive-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	$ 840	$ 564	$ 4,103	$ 23,224
Liability-classified awards compensation expense, Performance units				4,794
Total share and incentive-based compensation expense				28,018
Less: Capitalized compensation expense	(34)	(58)	(173)	(947)
Share-based compensation expense, net	806	506	3,930	27,071
Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	841	564	3,125	4,302
Liability-classified awards compensation expense, Performance units				776
Total share and incentive-based compensation expense				5,078
Less: Capitalized compensation expense	(34)	(58)	(173)	(392)
Share-based compensation expense, net	807	506	2,952	4,686
Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	478	9,196
Liability-classified awards compensation expense, Performance units				2,151
Total share and incentive-based compensation expense				11,347
Less: Capitalized compensation expense	0	0	0	0
Share-based compensation expense, net	0	0	478	11,347
Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	(1)	0	500	3,935
Liability-classified awards compensation expense, Performance units				558
Total share and incentive-based compensation expense				4,493
Less: Capitalized compensation expense	0	0	0	0
Share-based compensation expense, net	(1)	0	500	4,493
Accelerated Vesting
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	0	5,791
Liability-classified awards compensation expense, Performance units				1,309
Total share and incentive-based compensation expense				7,100
Less: Capitalized compensation expense	0	0	0	(555)
Share-based compensation expense, net	0	0	0	6,545
Restricted Stock
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	477	523	2,749	21,000
Restricted Stock | Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	478	523	2,052	3,902
Restricted Stock | Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	197	8,140
Restricted Stock | Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	(1)	0	500	3,777
Restricted Stock | Accelerated Vesting
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	0	5,181
Performance Share Units
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	168	41	836	2,224
Performance Share Units | Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	168	41	555	400
Performance Share Units | Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	281	1,056
Performance Share Units | Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	0	158
Performance Share Units | Accelerated Vesting
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	$ 0	0	$ 610
Stock Option
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	195		518
Stock Option | Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	195		518
Stock Option | Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0		0
Stock Option | Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0		0
Stock Option | Accelerated Vesting
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	$ 0		$ 0

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Amount of cost expensed and capitalized for award under share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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