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Share-Based Compensation - Additional Information (Details)	1 Months Ended		12 Months Ended
	May 31, 2017 shares	May 31, 2013 shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) CorporateOfficer shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, fair value assumptions, method used			Share-based compensation expense for stock options granted in previous years was calculated on the date of grant using the Black-Scholes-Merton option-pricing model
Stock options granted, shares			0	0
Cash proceeds received from stock option exercises \| $			$ 6,800,000	$ 11,900,000	$ 4,900,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized \| $			$ 44,800,000
Share-based compensation arrangement by share-based payment award, award granted in period			573,000	670,000	646,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition			2 years 2 months 12 days
Aggregate fair value amount of shares vested \| $			$ 37,600
Corporate Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees impacted by stock modification \| CorporateOfficer					2
Corporate Officers \| Selling, General and Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental expense \| $					$ 1,800,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized \| $			$ 0
Stock Options \| Corporate Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock modification, number of shares subject to accelerated vesting					7,500
Stock Options \| Plan 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, description			Stock options under the 2013 Plan generally vest in equal annual installments over a four-year period and expire eight years after the grant date
Share-based compensation arrangement by share-based payment award, award vesting period		4 years
Share-based compensation arrangement by share-based payment award, expiration period		8 years
Share-based compensation arrangement by share-based payment award, number of shares authorized	12,000,000	6,000,000
Share-based compensation arrangement by share-based payment award, number of additional shares authorized	6,000,000
Restricted Stock Awards and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period			4 years
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition			4 years
Incremental expense \| $			$ 1,700,000
Restricted Stock Awards and Restricted Stock Units \| 2001 Omnibus Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award granted in period			0
Stock Awards \| Corporate Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock modification, number of shares subject to accelerated vesting					79,720
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period			3 years
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition			3 years