Long-term Equity-based Compensation - Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan (Details)	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Number of DSUs
Vested Balance at Beginning of the Year (in shares) | shares	44,820
Reduction for Shares Issued on Conversion (in shares) | shares	0
Vested Balance at December 31, 2019 (in shares) | shares	44,820
Weighted- average Grant-date Fair Value Per DSU
Vested Balance at Beginning of the Year (in dollars per share) | $ / shares	$ 44.74
Reduction for Shares Issued on Conversion (in dollars per share) | $ / shares	0
Vested Balance at December 31, 2019 (in dollars per share) | $ / shares	$ 44.74