Share-based Compensation - Award Activity (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Restricted Stock Units (RSUs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	1,511,820
Granted (in shares) | shares	16,980
Forfeited/cancelled (in shares) | shares	(3,896)
Vested (in shares) | shares	(215,069)
Outstanding at the end of the period (in shares) | shares	1,309,835
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 44.49
Granted (in usd per share)	39.67
Forfeited/canceled (in usd per share)	49.84
Vested (in usd per share)	44.82
Outstanding at the end of the period (in dollars per share)	$ 44.36
Restricted Stock Awards (RSAs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	888,305
Forfeited/cancelled (in shares) | shares	(402)
Vested (in shares) | shares	(104,690)
Outstanding at the end of the period (in shares) | shares	783,213
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 40.67
Forfeited/canceled (in usd per share)	39.58
Vested (in usd per share)	43.48
Outstanding at the end of the period (in dollars per share)	$ 40.07
Non-Vested Stock Options Outstanding
Non-Vested Stock Options Outstanding, Shares Activity
Beginning balance (in shares) | shares	120,809
Exercised (in shares) | shares	0
Forfeited/canceled (in shares) | shares	(3,173)
Expired (in shares) | shares	0
Vested (in shares) | shares	55,568
Ending balance (in shares) | shares	62,068
Non-Vested Stock Options Outstanding, Weighted-average Grant Date Fair Value
Beginning balance (in usd per share)	$ 39.63
Exercised (in usd per share)	0
Forfeited/canceled (in usd per share)	39.00
Expired (in usd per share)	0
Vested (in usd per share)	38.25
Ending balance (in usd per share)	$ 40.89
Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	55,568
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Forfeited/canceled (in usd per share)	$ 39.00
Expired (in usd per share)	0
Vested (in usd per share)	$ 38.25
Stock Options Outstanding
Non-Vested Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	55,568
Non-Vested Stock Options Outstanding, Weighted-average Grant Date Fair Value
Exercised (in usd per share)	$ 18.18
Forfeited/canceled (in usd per share)	0
Expired (in usd per share)	34.38
Vested (in usd per share)	$ 38.25
Stock Options Outstanding, Shares Activity
Beginning balance (in shares) | shares	495,165
Forfeited/canceled (in shares) | shares	0
Expired (in shares) | shares	(34,323)
Vested (in shares) | shares	55,568
Ending balance (in shares) | shares	497,136
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Beginning balance (in usd per share)	$ 29.48
Forfeited/canceled (in usd per share)	0
Expired (in usd per share)	34.38
Vested (in usd per share)	38.25
Ending balance (in usd per share)	$ 30.56
Exercisable/vested (in shares) | shares	497,136
Exercisable/vested (in usd per share)	$ 30.56
Stock options
Non-Vested Stock Options Outstanding, Shares Activity
Exercised (in shares) | shares	(19,274)