Stock Incentive Plans - Securities Vested and Expected to Vest (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Options and Non-Options Equity Instruments, Vested, Outstanding, Number (in shares) | shares	1,624
Total Options and Non-Options Equity Instruments, Expected to Vest, Outstanding, Number (in shares) | shares	389,986
Total Options and Non-Options Equity Instruments, Vested, Outstanding, Aggregate Intrinsic Value | $	$ 70
Total Options and Non-Options Equity Instruments, Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 16,793
Common stock, price per share (in dollars per share) | $ / shares	$ 43.07
2007 LTIP | Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Vested, Outstanding, Number (in shares) | shares	1,624
Equity Instruments Other than Options, Expected to Vest, Outstanding, Number (in shares) | shares	0
Equity Instruments Other than Options, Vested, Outstanding, Aggregate Intrinsic Value | $	$ 70
Equity Instruments Other than Options, Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 0
2010 LTIP | Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Vested, Outstanding, Number (in shares) | shares	0
Equity Instruments Other than Options, Expected to Vest, Outstanding, Number (in shares) | shares	222,963
Equity Instruments Other than Options, Vested, Outstanding, Aggregate Intrinsic Value | $	$ 0
Equity Instruments Other than Options, Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 9,601
2010 LTIP | Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Vested, Outstanding, Number (in shares) | shares	0
Equity Instruments Other than Options, Expected to Vest, Outstanding, Number (in shares) | shares	167,023
Equity Instruments Other than Options, Vested, Outstanding, Aggregate Intrinsic Value | $	$ 0
Equity Instruments Other than Options, Expected to Vest, Outstanding, Aggregate Intrinsic Value | $	$ 7,192