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Annualized Effective Compounded Return Rate

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The length of the performance period related to the Long Term Incentive performance-vesting shares.

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The number of common shares considered probable of vesting as of the current quarter.

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Percentage of bonus which is payable in cash.

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Percentage of bonus which is payable in performance-vesting restricted shares based on the Company's achievement of performance goals

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The percentage of total granted shares which can be earned at the end of each performance period.

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Return On Investment

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The number of shares awarded 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). Represents total shares that could be earned under the maximum performance level of achievement for all performance periods.

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No definition available.

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Share based compensation arrangement by share based payment award performance period end date.

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Share based compensation arrangement by share based payment award performance period start date.

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No definition available.

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- Definition

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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Aggregate number of common shares reserved for future issuance.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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- Definition

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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- Definition

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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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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- Definition

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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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Net number of share options (or share units) granted during the period.

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Percentage of vesting of share-based compensation awards.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity-Based Compensation - Additional Information (Detail) - USD ($)				3 Months Ended		6 Months Ended
	Apr. 07, 2015	Mar. 03, 2015	Jan. 15, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total equity compensation expense						$ 3,251,000	$ 1,335,000
Bonus Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares						447,627
Weighted average grant date fair value						$ 19.02
Long-Term Incentive Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						4 years
Vesting percentage						25.00%
Long-Term Incentive Options, expiration period						10 years
Options, granted						1,992,594
Long-Term Incentive Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares						75,832
Weighted average grant date fair value						$ 18.96
2.25x Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity compensation cost				$ 29,000,000		$ 29,000,000
Recognized equity compensation expense				$ 0	$ 0
Annualized effective compounded return rate						20.00%
Return on investment				2.25%		2.25%
Additional future funds to receive						$ 7,000,000
2.75x Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity compensation cost				$ 17,000,000		17,000,000
Recognized equity compensation expense						$ 0	0
Annualized effective compounded return rate						15.00%
Return on investment				2.75%		2.75%
Additional future funds to receive						$ 435,000,000
Time-Vesting Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares						667,441
Weighted average grant date fair value						$ 19.06
Time-Vesting Restricted Shares [Member] \| Interim Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares			100,000
Weighted average grant date fair value			$ 16.50
Vesting period, description						The earlier of the start date of a new Chief Executive Officer or June 30, 2015
Time-Vesting Restricted Shares [Member] \| Board Members [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						3 years
Granted shares						49,284
Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance				15,000,000		15,000,000
Shares available for future issuance				11,359,427		11,359,427
Total equity compensation expense				$ 1,398,000	$ 573,000	$ 3,251,000	$ 1,335,000
Unrecognized equity compensation cost				19,400,000		$ 19,400,000
2015 Bonus Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of bonus payable by cash						50.00%
2015 Bonus Plan [Member] \| Bonus Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity compensation cost				8,200,000		$ 8,200,000
Percentage of bonus payable by shares						50.00%
Recognized equity compensation expense						$ 0
2015 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares earned, percentage						33.00%
2015 Long-Term Incentive Plan [Member] \| Long-Term Incentive Time Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						4 years
Vesting percentage						25.00%
2015 Long-Term Incentive Plan [Member] \| Long-Term Incentive Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period, beginning date						Jan. 01, 2015
Performance period, ending date						Dec. 31, 2017
Performance period						3 years
Awarded shares						202,491
Weighted average grant date fair value		$ 18.96
Number of shares probable of vesting related to the first performance period						21,597
2015 Long-Term Incentive Plan [Member] \| Long-Term Incentive Performance Restricted Shares [Member] \| Target Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity compensation cost				365,000		$ 365,000
2015 Long-Term Incentive Plan [Member] \| Long-Term Incentive Performance Restricted Shares [Member] \| First Performance Level [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares		67,487
2015 Long-Term Incentive Plan [Member] \| Long-Term Incentive Performance Restricted Shares [Member] \| Maximum Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized equity compensation cost				$ 870,000		$ 870,000
2015 Long-Term Incentive Plan Below Threshold Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						0.00%
2015 Long-Term Incentive Plan Threshold Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						50.00%
2015 Long-Term Incentive Plan Target Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						100.00%
2015 Long-Term Incentive Plan At or Above Maximum Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						200.00%
Other 2015 Grants [Member] \| Bonus Performance Restricted Shares [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted shares	27,623
Other 2015 Grants [Member] \| Time-Vesting Restricted Shares [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Granted shares	249,875
Other 2015 Grants [Member] \| Nonqualified Stock Options [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Options, granted	1,089,324