Share-Based Compensation - Schedule of Information with Respect to all Outstanding Restricted Stock and Restricted Stock Units (Parenthetical) (Detail) - shares	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Adjustment to restricted stock units		163,566
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vested stock settled in cash	9,200

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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