Share-Based Compensation - Narrative (Details) - USD ($)		1 Months Ended				3 Months Ended		9 Months Ended
	Jan. 24, 2014	Mar. 31, 2015	Feb. 28, 2015	Mar. 31, 2014	Feb. 28, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation before income tax benefit						$ 1,025,000	$ 59,000	$ 3,131,000	$ 1,562,000
Dividends declared per common share (USD per share)	$ 1.50					$ 0.1	$ 0.1	$ 0.3	$ 1.8
Dividends paid or unpaid	$ 30,500,000
Repurchase of Common Stock for Employee Tax Withholding Obligations amount, shares								34,364	45,711
Repurchase of Common Stock for Employee Tax Withholding Obligations amount								$ 900,000	$ 1,100,000
Shares Available for Grant						964,960		964,960
Performance unit incentive plan (“PUP”)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation before income tax benefit						$ 456,000	$ (600,000)	$ 1,444,000	(505,000)
Award vesting period								3 years
Payments To Employees		$ 2,400,000		$ 2,900,000
Restricted stock units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation before income tax benefit						46,000	$ 6,000	$ 64,000	$ 1,000
Unamortized cost						3,100,000		$ 3,100,000
Recognition Period of Unrecognized cost								1 year 7 months 12 days
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Payments To Employees			$ 200,000		$ 200,000
Liabilities related to restricted stock						300,000		$ 300,000		$ 500,000
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unamortized cost						0		0
Performance unit incentive plan (“PUP”)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Liability awards recorded						1,900,000		1,900,000		$ 3,500,000
Restructuring Charges
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation before income tax benefit						$ 0		$ 100,000