Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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No definition available.

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The amount of employee and related claims included in liabilities subject to compromise.

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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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No definition available.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares for which recognition of compensation cost was accelerated.

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Share-Based Compensation - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation liability transferred to liabilities subject to compromise	$ 0.6		$ 0.6
Share-based compensation expense	2.0	$ 8.2	9.4	$ 13.9
Share-based compensation, capitalized	0.5	$ 1.3	1.2	$ 2.6
Accelerated vesting compensation cost			$ 5.4
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Unrecognized compensation cost related to unvested awards	$ 7.8		$ 7.8
Unrecognized compensation cost, period of recognition			1 year 8 months 12 days
Accelerated vesting (in shares)			1.3
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting (in shares)			1.8
Company Management \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting (in shares)			1.3