Debt - Schedule of Applicable Percentages (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio	2.70%
Prior Senior Secured Credit Facility | Pricing Tier 1
Line of Credit Facility [Line Items]
Commitment Fee		0.50%
Prior Senior Secured Credit Facility | Pricing Tier 1 | Minimum
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		375.00%
Prior Senior Secured Credit Facility | Pricing Tier 1 | Eurodollar Rate Loans and LIBOR Letter of Credit Fee
Line of Credit Facility [Line Items]
Interest rate		4.00%
Prior Senior Secured Credit Facility | Pricing Tier 1 | Daily Floating Rate Loans
Line of Credit Facility [Line Items]
Interest rate		4.00%
Prior Senior Secured Credit Facility | Pricing Tier 1 | Rate Loans
Line of Credit Facility [Line Items]
Interest rate		3.00%
Prior Senior Secured Credit Facility | Pricing Tier 2
Line of Credit Facility [Line Items]
Commitment Fee		0.50%
Prior Senior Secured Credit Facility | Pricing Tier 2 | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		375.00%
Prior Senior Secured Credit Facility | Pricing Tier 2 | Minimum
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		300.00%
Prior Senior Secured Credit Facility | Pricing Tier 2 | Eurodollar Rate Loans and LIBOR Letter of Credit Fee
Line of Credit Facility [Line Items]
Interest rate		3.50%
Prior Senior Secured Credit Facility | Pricing Tier 2 | Daily Floating Rate Loans
Line of Credit Facility [Line Items]
Interest rate		3.50%
Prior Senior Secured Credit Facility | Pricing Tier 2 | Rate Loans
Line of Credit Facility [Line Items]
Interest rate		2.50%
Prior Senior Secured Credit Facility | Pricing Tier 3
Line of Credit Facility [Line Items]
Commitment Fee		0.40%
Prior Senior Secured Credit Facility | Pricing Tier 3 | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		300.00%
Prior Senior Secured Credit Facility | Pricing Tier 3 | Minimum
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		225.00%
Prior Senior Secured Credit Facility | Pricing Tier 3 | Eurodollar Rate Loans and LIBOR Letter of Credit Fee
Line of Credit Facility [Line Items]
Interest rate		3.00%
Prior Senior Secured Credit Facility | Pricing Tier 3 | Daily Floating Rate Loans
Line of Credit Facility [Line Items]
Interest rate		3.00%
Prior Senior Secured Credit Facility | Pricing Tier 3 | Rate Loans
Line of Credit Facility [Line Items]
Interest rate		2.00%
Prior Senior Secured Credit Facility | Pricing Tier 4
Line of Credit Facility [Line Items]
Commitment Fee		0.30%
Prior Senior Secured Credit Facility | Pricing Tier 4 | Maximum [Member]
Line of Credit Facility [Line Items]
Consolidated Leverage Ratio		225.00%
Prior Senior Secured Credit Facility | Pricing Tier 4 | Eurodollar Rate Loans and LIBOR Letter of Credit Fee
Line of Credit Facility [Line Items]
Interest rate		2.50%
Prior Senior Secured Credit Facility | Pricing Tier 4 | Daily Floating Rate Loans
Line of Credit Facility [Line Items]
Interest rate		2.50%
Prior Senior Secured Credit Facility | Pricing Tier 4 | Rate Loans
Line of Credit Facility [Line Items]
Interest rate		1.50%