Share-Based Compensation - Narrative (Details) - USD ($)	1 Months Ended				3 Months Ended		6 Months Ended
	Mar. 31, 2016	Feb. 29, 2016	Mar. 31, 2015	Feb. 28, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period							3 years
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unamortized cost					$ 3,500,000		$ 3,500,000
Recognition period of unrecognized cost							1 year 7 months 6 days
Repurchase of common stock for employee tax withholding obligations amount, shares							23,625	34,184
Repurchase of common stock for employee tax withholding obligations amount							$ 700,000	$ 900,000
Shares available for grant					892,084		892,084
Performance Unit Incentive Plan ("PUP")
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Awards granted during the period							$ 2,700,000
Stock value payable							900,000
Liability awards recorded					$ 3,500,000		3,500,000		$ 2,400,000
Payments to employees	$ 200,000		$ 2,400,000
Restricted Stock Units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Payments to employees		$ 200,000		$ 300,000
Liabilities related to restricted stock					200,000		200,000		$ 300,000
Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unamortized cost					$ 0		$ 0
Exercised					0		0
Forfeited or expired					0		0
Exercisable					63,773		63,773		63,773
Outstanding					63,773		63,773		63,773
Weighted-average exercise price					$ 16.62		$ 16.62		$ 16.62
Restructuring Charges
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation before income tax benefit					$ 0	$ 56,000	$ 200,000	$ 100,000