Stock-Based Compensation Plans - Summary of Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares
Number of Shares
Outstanding, beginning balance (in shares) | shares	2,186,511
Exercised (in shares) | shares	(380,676)
Outstanding, ending balance (in shares) | shares	1,805,835
Exercisable, ending balance (in shares) | shares	1,805,835
Weighted Average Exercise Price ($)
Beginning balance (in dollars per share) | $ / shares	$ 17.87
Exercised (in dollars per share) | $ / shares	19.05
Ending balance (in dollars per share) | $ / shares	17.63
Weighted average exercise price, exercisable, ending balance (in dollars per share) | $ / shares	$ 17.63
Weighted Average Remaining Contractual Term (Years)
Weighted average remaining contractual term, outstanding, end of period (in years)	3 years 3 months 7 days
Weighted average remaining contractual term, exercisable, end of period (in years)	3 years 3 months 7 days
Aggregate Intrinsic Value of In-the-Money Options ($)
Aggregate intrinsic value of in-the-money options, outstanding, end of period | $	$ 23,662,370
Aggregate intrinsic value of in-the-money options, exercisable, end of period | $	$ 23,662,370