Debt - Schedule Of Debt (Detail)	9 Months Ended
	Sep. 30, 2020
Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	> 2.50:1.00
Revolving B Commitment Fee	0.60%
Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 2.50:1.00 but > 2.00:1.00
Revolving B Commitment Fee	0.55%
Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 2.00:1.00 but > 1.50:1.00
Revolving B Commitment Fee	0.50%
Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Consolidated Debt to Consolidated EBITDA Ratio	< 1.50:1.00
Revolving B Commitment Fee	0.45%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.75%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.50%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	2.25%
London Interbank Offered Rate (LIBOR) [Member] | Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Eurodollar Rate Loans / LIBOR Index	1.80%
Base Rate [Member] | Pricing Tier One [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.75%
Base Rate [Member] | Pricing Tier Two [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.50%
Base Rate [Member] | Pricing Tier Three [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	1.25%
Base Rate [Member] | Pricing Tier Four [Member]
Line of Credit Facility [Line Items]
Base Rate Loans	0.80%