XML 484 R101.htm IDEA: XBRL DOCUMENT v3.21.1
Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Footnote) (Detail) - interest_rate_swap
Feb. 05, 2021
Dec. 31, 2020
Interest Rate Swap Agreements    
Derivative [Line Items]    
Numbers of Derivatives Subject to Mandatory Early Termination   3
Interest Rate Swap Agreements | Subsequent Events    
Derivative [Line Items]    
Derivative, Number of Instruments Terminated 1  
Minimum    
Derivative [Line Items]    
Variable interest rate on debt   0.30%
Maximum    
Derivative [Line Items]    
Variable interest rate on debt   4.25%