Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 14.7	$ 12.9	$ 10.8
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount	1.0	0.5	0.2
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 13.9
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	10 months 24 days
Employee Service Share-based Compensation, Cash Flow Effect, Cash Used to Settle Awards	$ 3.7	2.9	4.8
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 9.3	$ 7.6	$ 10.5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Exercise of stock options, Shares	69,852
Minimum [Member] | Risk Free Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Requisite service period		3 months	3 months
Minimum [Member] | Volatility [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Requisite service period		1 year	3 years
Maximum [Member] | Risk Free Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Requisite service period		3 years	3 years
Maximum [Member] | Volatility [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Requisite service period		3 years	1 year
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 72.98	$ 71.85	$ 84.53
Requisite service period	3 years	3 years	3 years
Restricted Stock [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 1.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 2 months 12 days
Exercise of stock options, Shares	69,852	17,823	21,006
Proceeds from Stock Options Exercised	$ 2.9	$ 0.9	$ 0.4
Employee Stock Option [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 months 18 days
Employee Stock Option [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	2 years 3 months 18 days
2013 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	2,000,000