Share-based Compensation - Award Activity (Details)	9 Months Ended
	Sep. 30, 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	1,465,165
Forfeited/canceled (in shares) | shares	(45,388)
Vested (in shares) | shares	(601,651)
Outstanding at the end of the period (in shares) | shares	2,329,946
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in usd per share)	$ 44.49
Granted (in usd per share)	24.59
Forfeited/canceled (in usd per share)	28.93
Vested (in usd per share)	43.99
Outstanding at the end of the period (in usd per share)	$ 32.41
Restricted Stock Awards (RSAs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares) | shares	888,305
Granted (in shares) | shares	54,040
Forfeited/canceled (in shares) | shares	(7,959)
Vested (in shares) | shares	(379,485)
Outstanding at the end of the period (in shares) | shares	554,901
Restricted Stock Awards, Weighted-average Grant Date Fair Value
Outstanding at the beginning of the period (in usd per share)	$ 40.67
Granted (in usd per share)	25.91
Forfeited/canceled (in usd per share)	39.91
Vested (in usd per share)	41.11
Outstanding at the end of the period (in usd per share)	$ 38.63
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	(3,659)
Expired (in shares) | shares	0
Vested (in shares) | shares	57,262
Ending balance (in shares) | shares	59,888
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)	38.18
Expired (in usd per share)	0
Vested (in usd per share)	38.38
Ending balance (in usd per share)	$ 40.92
Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	57,262
Stock Options Outstanding, Weighted-average Grant Date Fair Value
Forfeited/canceled (in usd per share)	$ 38.18
Expired (in usd per share)	0
Vested (in usd per share)	$ 38.38
Stock Options Outstanding
Non-Vested Stock Options Outstanding, Shares Activity
Vested (in shares) | shares	57,262
Non-Vested Stock Options Outstanding, Weighted-average Grant Date Fair Value
Exercised (in usd per share)	$ 22.03
Forfeited/canceled (in usd per share)	0
Expired (in usd per share)	38.89
Vested (in usd per share)	$ 38.38
Stock Options Outstanding, Shares Activity
Beginning balance (in shares) | shares	495,165
Forfeited/canceled (in shares) | shares	0
Expired (in shares) | shares	(74,626)
Vested (in shares) | shares	57,262
Ending balance (in shares) | shares	395,525
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)	38.89
Vested (in usd per share)	38.38
Ending balance (in usd per share)	$ 30.55
Exercisable/vested (in shares) | shares	395,525
Exercisable/vested (in usd per share)	$ 30.55
Stock options
Non-Vested Stock Options Outstanding, Shares Activity
Exercised (in shares) | shares	(82,276)