Financing Arrangement - Schedule of Term Facility Financial Covenants (Detail) - Term Facility Financial Covenants [Member]	9 Months Ended
	Sep. 30, 2015
Q3 2015 to Q1 2016 [Member] | Maximum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	6.25
Q3 2015 to Q1 2016 [Member] | Minimum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	1.00
Q2 2016 to Q4 2016 [Member] | Maximum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	6.00
Q2 2016 to Q4 2016 [Member] | Minimum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	1.00
Q1 2017 to Q2 2017 [Member] | Maximum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	5.50
Q1 2017 to Q2 2017 [Member] | Minimum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	1.00
Thereafter [Member] | Maximum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	5.00
Thereafter [Member] | Minimum [Member]
Quarterly Results Of Operations [Line Items]
Total Net Leverage Ratio	1.00