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Share and Incentive Based Compensation - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended		3 Months Ended
	Feb. 28, 2017 shares	Oct. 31, 2016 $ / Unit	Jun. 30, 2018 shares	Mar. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2017 USD ($)	Oct. 01, 2016 shares
Share and Incentive Based Compensation Arrangement
Shares authorized for issuance | shares						4,600
Accelerated vesting compensation cost				$ 12,950
Number of Shares | shares				763
Performance units vesting period				3 years
Performance units weighted average grant date fair value | $ / Unit		100
Performance units compensation expense				$ 3,500
Performance units accelerated compensation cost				1,000
Performance units liability				400
Restricted Stock
Share and Incentive Based Compensation Arrangement
Share-based compensation expense				14,600	$ 3,600
Share-based compensation, capitalized				200	$ 500
Unrecognized compensation cost related to unvested awards				$ 7,100
Unrecognized compensation cost, period of recognition				1 year 6 months
Aggregate intrinsic value of vested awards				$ 3,400
Shares granted | shares				3
Value of shares granted (in usd per share) | $ / shares				$ 15.45
Restricted Stock | Minimum
Share and Incentive Based Compensation Arrangement
Vesting period				2 years 6 months
Restricted Stock | Maximum
Share and Incentive Based Compensation Arrangement
Vesting period				3 years
Performance Share Units
Share and Incentive Based Compensation Arrangement
Share-based compensation expense				$ 1,500
Accelerated vesting compensation cost				$ 400
Shares granted | shares				0
Performance Share Units | Maximum
Share and Incentive Based Compensation Arrangement
Shares granted | shares	400
Reduction in Workforce [Member]
Share and Incentive Based Compensation Arrangement
Performance units accelerated compensation cost				$ 2,000
Reduction in Workforce [Member] | Restricted Stock
Share and Incentive Based Compensation Arrangement
Accelerated vesting compensation cost				7,800
Reduction in Workforce [Member] | Common Stock
Share and Incentive Based Compensation Arrangement
Accelerated vesting compensation cost				$ 4,000
Number of Shares | shares				200
Reduction in Workforce [Member] | Performance Share Units
Share and Incentive Based Compensation Arrangement
Accelerated vesting compensation cost				$ 700
Reduction in Workforce [Member] | Forecast | Restricted Stock
Share and Incentive Based Compensation Arrangement
Number of Shares | shares			400

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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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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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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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