Debt - Schedule of Applicable Rates and Commitment Fees (Detail) - Third Amended Credit Agreement [Member]	12 Months Ended
	Dec. 31, 2015
Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Commitment Fee	0.30%
Pricing Tier One [Member] | Eurodollar Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	1.90%
Pricing Tier One [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	0.90%
Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Commitment Fee	0.25%
Pricing Tier Two [Member] | Eurodollar Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	1.65%
Pricing Tier Two [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	0.65%
Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Commitment Fee	0.20%
Pricing Tier Three [Member] | Eurodollar Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	1.40%
Pricing Tier Three [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	0.40%
Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Commitment Fee	0.15%
Pricing Tier Four [Member] | Eurodollar Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	1.15%
Pricing Tier Four [Member] | Base Rate Loans [Member]
Line of Credit Facility [Line Items]
Loans, Interest Rate	0.15%
Minimum [Member] | Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	2.5
Minimum [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	2.0
Minimum [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	1.5
Maximum [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	2.5
Maximum [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	2.0
Maximum [Member] | Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	1.5