Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares authorized	100,000,000		100,000,000		100,000,000
Common stock, par value	$ 0.01		$ 0.01		$ 0.01
Preferred stock shares authorized	50,000,000		50,000,000		50,000,000
Preferred stock, par value	$ 0.01		$ 0.01		$ 0.01
Common stock shares issued, excluding restricted common shares	20,700,000		20,700,000		20,600,000
Common stock shares outstanding, excluding restricted common shares	20,700,000		20,700,000		20,600,000
Common stock shares repurchased			200,000
Weighted average price per share	$ 15.03		$ 15.03
Common stock shares for stock award issuance	1,800,000		1,800,000
Common stock shares for stock award, available for issuance	600,000		600,000
Compensation expense	$ 1.7	$ 1.4	$ 3.5	$ 2.5
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares issued related to vesting of restricted stock awards	100,000		200,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	17,100		500,000
Weighted average grant date fair value	$ 17.50		$ 14.28
Awards vesting period			3 years