Stock-Based and Other Compensation - Narratives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense	$ 15,938,000	$ 18,787,000	$ 18,294,000
Employee service share-based compensation, tax benefit from compensation expense	4,700,000	5,100,000	6,600,000
Options vested during the period, aggregate intrinsic value	24,000,000.0	39,400,000	16,400,000
Deferred compensation obligation	$ 42,014,000	37,263,000
Deferred Profit Sharing
Share-based Compensation Arrangement by Share-based Payment Award
Maximum percentage of annual contribution allowed by employees	10.00%
Maximum annual contribution per employee, amount	$ 28,500	28,000	27,500
Profit sharing expense	$ 1,900,000	2,100,000	2,600,000
2017 Share Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized for grant (shares)				4,000,000
Shares available for grant (shares)	3,018,891
RSU, and PSU
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense			4,200,000
PSUs Awarded
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period	3 years
PSUs Awarded | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Potential performance return rate for stock awards	0
PSUs Awarded | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Potential performance return rate for stock awards	3
PSUs Awarded | 2017 Share Incentive Plan | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award
Vesting percentage	33.33%
PSUs Awarded | 2017 Share Incentive Plan | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award
Vesting percentage	33.33%
PSUs Awarded | 2017 Share Incentive Plan | Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award
Vesting percentage	33.33%
RSA and RSU Awards
Share-based Compensation Arrangement by Share-based Payment Award
Share grant conversion rate	1
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation expense	$ 100,000	100,000	100,000
Share-based compensation arrangement by share-based payment award, maximum employee contribution rate	10.00%
Share based compensation, effective share purchase price for participant	90.00%
Proceeds from stock plans	$ 400,000	$ 300,000	$ 200,000
Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Stock options required to be issued (shares)	986,859	893,713
Deferred compensation obligation	$ 42,000,000.0	$ 37,300,000
Fair value assumptions expected dividend rate	0.00%
Unrecognized stock based compensation expense	$ 19,300,000
Weighted-average remaining term	1 year 8 months 12 days
Long Term Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Risk free interest rate	1.60%
Fair value assumptions expected volatility rate	15.20%