Share-Based Compensation - Narrative (Details) - USD ($)			1 Months Ended					12 Months Ended
	Jan. 24, 2014	Oct. 25, 2013	Mar. 31, 2015	Feb. 28, 2015	Mar. 31, 2014	Feb. 28, 2014	Feb. 28, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Useful Life of the 2007 plan								10 years
Minimum number of shares of common stock available for grant								1,700,000
Additional number of shares of common stock available for grant								1,500,000
Shares Available for Grant								959,330
Capitalized share-based compensation costs								$ 0	$ 0	$ 0
Dividends declared per common share (USD per share)	$ 1.50	$ 2.50						$ 0.40	$ 1.90	$ 2.90
Repurchase of Common Stock for Employee Tax Withholding Obligations amount, shares								35,649	72,996	50,156
Repurchase of Common Stock for Employee Tax Withholding Obligations amount								$ 1,000,000	$ 1,800,000	$ 1,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross								0	0	0
Options outstanding, Shares								63,773	247,590
Options exercisable, Shares								63,773	247,590
Weighted average exercise price								$ 16.62	$ 17.82
Weighted average remaining contractual life								3 years 2 months 12 days
Performance unit incentive plan (“PUP”)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period								3 years
Liability awards recorded								$ 2,400,000	$ 3,500,000
Payments To Employees			$ 2,500,000		$ 2,900,000					$ 0
Restricted stock units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Grant date fair value of restricted stock vested								2,200,000	4,500,000	3,500,000
Unamortized cost								$ 2,700,000
Recognition Period of Unrecognized cost								1 year 4 months 24 days
Restricted stock units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Payments To Employees				$ 300,000		$ 200,000	$ 300,000
Liabilities related to restricted stock								$ 300,000	500,000
Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unamortized cost								0
Restructuring Charges
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense and reversal								45,000	(100,000)	700,000
Restructuring Charges | Performance unit incentive plan (“PUP”)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense and reversal								$ 45,000	$ (100,000)	$ 300,000