Equity Compensation (Stock Options Outstanding by Exercise Price) (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 18.22	$ 18.26
$ 12.15 – $20.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	12.15
Exercise price range, upper limit (in dollars per share)	20.00
$ 20.01 – $25.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	20.01
Exercise price range, upper limit (in dollars per share)	25.00
$ 25.01 – $30.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	25.01
Exercise price range, upper limit (in dollars per share)	30.00
$ 30.01 – $33.36
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit (in dollars per share)	30.01
Exercise price range, upper limit (in dollars per share)	$ 33.36
Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at end of period (in shares)	1,427,320
Options Outstanding - Weighted Average Remaining Contractual Life	3 years 6 months
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 18.22
Options Exercisable - Number Exercisable At end of period (in shares)	1,427,320
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 18.22
Stock Options | $ 12.15 – $20.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at end of period (in shares)	786,884
Options Outstanding - Weighted Average Remaining Contractual Life	5 years 6 months
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 12.75
Options Exercisable - Number Exercisable At end of period (in shares)	786,884
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 12.75
Stock Options | $ 20.01 – $25.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at end of period (in shares)	305,249
Options Outstanding - Weighted Average Remaining Contractual Life	1 year 4 months 24 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 24.45
Options Exercisable - Number Exercisable At end of period (in shares)	305,249
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 24.45
Stock Options | $ 25.01 – $30.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at end of period (in shares)	330,691
Options Outstanding - Weighted Average Remaining Contractual Life	4 months 24 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 25.28
Options Exercisable - Number Exercisable At end of period (in shares)	330,691
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 25.28
Stock Options | $ 30.01 – $33.36
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding - Number Outstanding at end of period (in shares)	4,496
Options Outstanding - Weighted Average Remaining Contractual Life	1 year 1 month 6 days
Options Outstanding - Weighted Average Exercise Price (in dollars per share)	$ 33.36
Options Exercisable - Number Exercisable At end of period (in shares)	4,496
Options Exercisable - Weighted Average Exercise Price (in dollars per share)	$ 33.36