Stock-Based Compensation and Equity - Restricted and Conditional Awards (Details)	6 Months Ended
	Jun. 30, 2021 $ / shares shares
RSA and RSU Awards
Shares
Nonvested, beginning balance - shares | shares	260,977
Granted - shares | shares	172,671
Vested - shares | shares	(117,002)
Forfeited - shares | shares	(777)
Adjustments - shares | shares	0
Nonvested, ending balance - shares | shares	315,869
Weighted-Average Grant Date Fair Value
Nonvested, beginning balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 74.75
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	66.63
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	73.24
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	74.78
Adjustments, weighted average grant date fair value (in dollars per share) | $ / shares	0
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 70.87
PSU Awards
Shares
Nonvested, beginning balance - shares | shares	262,013
Granted - shares | shares	134,290
Vested - shares | shares	(151,678)
Forfeited - shares | shares	0
Adjustments - shares | shares	188,953
Nonvested, ending balance - shares | shares	433,578
Weighted-Average Grant Date Fair Value
Nonvested, beginning balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 88.99
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	86.19
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	76.04
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	0
Adjustments, weighted average grant date fair value (in dollars per share) | $ / shares	74.57
Nonvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 86.45