Long-term Debt - Schedule of Maturities of Long Term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016
March 31, 2017 [Member]
Debt Instrument [Line Items]
Principal payment date	March 31, 2017
June 30, 2017-December 31, 2018 [Member]
Debt Instrument [Line Items]
Principal payment date	June 30, 2017-December 31, 2018