Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
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 (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Common stock shares issued, excluding restricted common shares	20,600,000		20,600,000		20,500,000
Common stock shares outstanding, excluding restricted common shares	20,600,000		20,600,000		20,500,000
Preferred stock shares authorized	50,000,000		50,000,000		50,000,000
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Shares of common stock for stock award issuances	1,800,000		1,800,000		1,800,000
Compensation expense	$ 1.4	$ 0.7	$ 3.9	$ 1.5
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock issued			500,000
Weighted average grant date fair value			$ 16.92
Awards vesting period			3 years
Unvested shares of restricted stock	700,000		700,000
Compensation not yet recognized	$ 10.1		$ 10.1
Compensation not yet recognized, period for recognition			2 years 1 month 6 days