Stock Incentive Plans - Share-Based Compensation Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Total Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Total outstanding, number (in shares)	597,531
Total granted, number (in shares)	384,746
Total vested/exercised, number (in shares)	(258,919)
Total canceled/forfeited, number (in shares)	(37,280)
Total outstanding, number (in shares)	686,078	597,531
Total exercisable, number (in shares)	1,624
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Granted, price (in dollars per share)	$ 29.67	$ 23.66	$ 38.37
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Granted, price (in dollars per share)	$ 29.90	$ 23.78
2007 LTIP | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	1,624
Granted, number (in shares)	0
Vested/exercised, number (in shares)	0
Canceled/forfeited, number (in shares)	0
Exercisable, number (in shares)	1,624
Outstanding, number (in shares)	1,624	1,624
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 0.01
Granted, price (in dollars per share)	0
Vested, price (in dollars per share)	0
Canceled/forfeited, price (in dollars per share)	0
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0.01
2010 LTIP | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	453,896
Granted, number (in shares)	223,308
Vested/exercised, number (in shares)	(203,243)
Canceled/forfeited, number (in shares)	(31,845)
Exercisable, number (in shares)	0
Outstanding, number (in shares)	442,116	453,896
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 0.01
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled/forfeited, price (in dollars per share)	0.01
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0
2010 LTIP | Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	142,011
Granted, number (in shares)	144,352	193,006
Vested/exercised, number (in shares)	(55,676)
Canceled/forfeited, number (in shares)	(5,435)
Exercisable, number (in shares)	0
Outstanding, number (in shares)	225,252	142,011
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 0.01
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled/forfeited, price (in dollars per share)	0.01
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Total Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Total vested/exercised, number (in shares)		(141,406)
2019 LTIP | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	0
Granted, number (in shares)	6,927
Vested/exercised, number (in shares)	0
Canceled/forfeited, number (in shares)	0
Exercisable, number (in shares)	0
Outstanding, number (in shares)	6,927	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 0
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled/forfeited, price (in dollars per share)	0
Outstanding, price (in dollars per share)	0.01	$ 0
Exercisable, price (in dollars per share)	$ 0
2019 LTIP | Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	0
Granted, number (in shares)	10,159
Vested/exercised, number (in shares)	0
Canceled/forfeited, number (in shares)	0
Exercisable, number (in shares)	0
Outstanding, number (in shares)	10,159	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 0
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled/forfeited, price (in dollars per share)	0
Outstanding, price (in dollars per share)	0.01	$ 0
Exercisable, price (in dollars per share)	$ 0
Maximum | 2010 LTIP | Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Granted, number (in shares)	154,511