Long-term Debt - Schedule of Interest Rate Margins (Detail)	3 Months Ended
	Mar. 31, 2016
Greater than 1.25 to 1 [Member] | Greater Than One Point Two Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.25
1.25 to 1 and 1.15 to 1 [Member] | Less Than Or Equal to One Point Two Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.25
1.25 to 1 and 1.15 to 1 [Member] | Greater Than One Point One Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.15
1.15 to 1 [Member] | Less Than Or Equal to One Point One Five [Member]
Debt Instrument [Line Items]
Fixed Charge Coverage Ratio	1.15
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | Greater than 1.25 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.25%
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | 1.25 to 1 and 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.50%
U.S. Base Rate, Canadian Base Rate and Canadian Prime Rate Loans [Member] | 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	1.75%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | Greater than 1.25 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.25%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | 1.25 to 1 and 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.50%
LIBOR Loans, BA Rate Loans and Letter of Credit Fees [Member] | 1.15 to 1 [Member]
Debt Instrument [Line Items]
LIBOR and BA Equivalent Rate Loans and Letter of Credit Fees	2.75%