Stock-Based Compensation - Summary of the Company's PRSU Activity (Details) - PRSUs - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of PRSUs
Outstanding at the beginning of the period	300,000	300,000	400,000
Granted	100,000	100,000	100,000
Issued	(100,000)	(100,000)	(200,000)
Outstanding at the end of the period	294,941	300,000	300,000
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period	$ 60.48	$ 51.75	$ 45.35
Granted	74.74	65.56	68.15
Issued	50.50	41.71	43.96
Outstanding at the end of the period	$ 68.77	$ 60.48	$ 51.75