Stock-Based Compensation - Equity-Classified Stock Compensation (Market Condition Restricted Shares) - Additional Information (Detail) - Restricted Shares [Member]	6 Months Ended
Jun. 30, 2016 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to market condition non-vested restricted shares	$ 0
2010 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period	5 years

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.

No definition available.

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