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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 ($)		1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 15, 2016	Apr. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2016	Apr. 01, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense			$ 2,461,000		$ 1,398,000	$ 32,051,000	$ 3,251,000
Unrecognized equity compensation cost			$ 30,630,000			$ 30,630,000
Weighted average grant date fair value of stock options						$ 3.74
Unvested shares of common stock			3,509,369			3,509,369
Accumulated dividends related to performance shares which vested during the period						$ 3,400,000
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			8,784,166			8,784,166
2016 Bonus Plan [Member] \| Scenario Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of bonus payable by cash								50.00%
2015 Long-Term Incentive Plan Below Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year						0.00%
2015 Long-Term Incentive Plan Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year						50.00%
2015 Long-Term Incentive Plan Target Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year						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, per year						200.00%
2.25x Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense				$ 27,516,000
Unvested shares of common stock									1,370,821	1,370,821
Accumulated dividends related to performance shares which vested during the period		$ 3,400,000
Bonus Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares						466,677
Unvested shares of common stock			447,475			447,475				415,995
Bonus Performance Restricted Shares [Member] \| 2016 Bonus Plan [Member] \| Scenario Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of bonus payable by shares								50.00%
Bonus Performance Restricted Shares [Member] \| 2015 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense						$ 0
Unrecognized equity compensation cost			$ 8,200,000			$ 8,200,000
Long-Term Incentive Options [Member] \| 2015 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						4 years
Vesting percentage, per year						25.00%
Long-Term Incentive Options, expiration period						10 years
Long-Term Incentive Time Restricted Shares [Member] \| 2015 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						4 years
Vesting percentage, per year						25.00%
Long-Term Incentive Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares						187,578
Unvested shares of common stock			219,569			219,569				62,365
Long-Term Incentive Performance Restricted Shares [Member] \| Fiscal 2016 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized equity compensation cost			$ 2,900,000			$ 2,900,000
Number of shares not probable of vesting						171,703
Long-Term Incentive Performance Restricted Shares [Member] \| Fiscal 2015 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized equity compensation cost			$ 156,000			$ 156,000
Long-Term Incentive Performance Restricted Shares [Member] \| 2015 Long-Term Incentive Plan [Member] \| Maximum Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awarded shares						143,625
Long-Term Incentive Performance Restricted Shares [Member] \| 2015 Long-Term Incentive Plan [Member] \| Fiscal 2016 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares						47,866
Long-Term Incentive Performance Restricted Shares [Member] \| 2015 and 2016 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period						3 years
Shares earned, percentage						33.00%
Long-Term Incentive Performance Restricted Shares [Member] \| 2016 Long-Term Incentive Plan [Member] \| Maximum Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awarded shares						371,548
Long-Term Incentive Performance Restricted Shares [Member] \| 2016 Long-Term Incentive Plan [Member] \| Fiscal 2016 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares						123,837
Performance Restricted Shares [Member] \| Equity Plan Modifications [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Modified shares			361,906			361,906
2.75x Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense						$ 0	$ 0
Unrecognized equity compensation cost			$ 11,900,000			$ 11,900,000
Unvested shares of common stock			1,341,621			1,341,621				1,370,821
Return on investment			2.75%			2.75%
Annualized effective compounded return rate						15.00%
Additional future funds to receive						$ 422,000,000
Time-Vesting Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares	53,333					527,007
Unvested shares of common stock			1,205,100			1,205,100				883,270
Time-Vesting Restricted Shares [Member] \| Three Year Vesting [Member] \| Board Members [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Granted shares	7,619
Time-Vesting Restricted Shares [Member] \| One Year Vesting [Member] \| Board Members [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year	100.00%
Granted shares	45,714