Stock Incentive Plans - Share-Based Compensation Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted, number (in shares)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Total Options and Non-Option Equity Instruments, Outstanding [Roll Forward]
Total outstanding, number (in shares)	729,884
Total granted, number (in shares)	280,653
Total vested/exercised, number (in shares)	(402,337)
Total canceled, number (in shares)	(207,008)
Total outstanding, number (in shares)	401,192	729,884
Total exercisable, number (in shares)	1,624
Restricted stock units (RSUs)
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)	$ 38.21	$ 32.47	$ 18.57
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)		$ 32.60	$ 18.40
2005 LTIP | Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	12,208
Granted, number (in shares)	0
Vested, number (in shares)	(12,208)
Canceled, number (in shares)	0
Outstanding, number (in shares)	0	12,208
Exercisable, number (in shares)	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)	$ 0.01
Granted, price (in dollars per share)	0.00
Vested, price (in dollars per share)	0.01
Canceled, price (in dollars per share)	0.00
Outstanding, price (in dollars per share)	0.00	$ 0.01
Exercisable, price (in dollars per share)	$ 0.00
2007 LTIP | Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, number (in shares)	21,206
Granted, number (in shares)	0
Exercised, number (in shares)	(12,370)
Canceled, number (in shares)	(8,836)
Outstanding, number (in shares)	0	21,206
Exercisable, number (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 4.80
Granted, price (in dollars per share)	0.00
Exercised, price (in dollars per share)	4.80
Canceled, price (in dollars per share)	4.80
Outstanding, price (in dollars per share)	0.00	$ 4.80
Exercisable, price	$ 0.00
2007 LTIP | Restricted stock units (RSUs)
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, number (in shares)	0
Canceled, number (in shares)	0
Outstanding, number (in shares)	1,624	1,624
Exercisable, number (in shares)	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)	0.00
Vested, price (in dollars per share)	0.00
Canceled, price (in dollars per share)	0.00
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0.01
2010 LTIP | Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, number (in shares)	30,000
Granted, number (in shares)	0
Exercised, number (in shares)	(30,000)
Canceled, number (in shares)	0
Outstanding, number (in shares)	0	30,000
Exercisable, number (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, price (in dollars per share)	$ 8.20
Granted, price (in dollars per share)	0.00
Exercised, price (in dollars per share)	8.20
Canceled, price (in dollars per share)	0.00
Outstanding, price (in dollars per share)	0.00	$ 8.20
Exercisable, price	$ 0.00
2010 LTIP | Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	328,578
Granted, number (in shares)	124,077
Vested, number (in shares)	(219,237)
Canceled, number (in shares)	(2,560)
Outstanding, number (in shares)	230,858	328,578
Exercisable, number (in shares)	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)	$ 0.01
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled, price (in dollars per share)	0.01
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0.00
2010 LTIP | Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, number (in shares)	336,268
Granted, number (in shares)	156,576
Vested, number (in shares)	(128,522)
Canceled, number (in shares)	(195,612)
Outstanding, number (in shares)	168,710	336,268
Exercisable, number (in shares)	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)	$ 0.01
Granted, price (in dollars per share)	0.01
Vested, price (in dollars per share)	0.01
Canceled, price (in dollars per share)	0.01
Outstanding, price (in dollars per share)	0.01	$ 0.01
Exercisable, price (in dollars per share)	$ 0.00