Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 04, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation costs charged to operations		$ 0.5	$ 0.5	$ 0.9	$ 0.9
Amended Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in the maximum number of shares available under the Plan	210,000
New maximum number of shares available under the Plan	14,242,061
Number of shares reserved under the Plan		5,230,642		5,230,642
Maximum number of shares available for grant under the Plan		108,129		108,129
Grants of ISO and non-qualified stock options (in shares)		0		0
Exercise of stock options (shares)				5,880
Non-qualified options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options (shares)		0	0	0	0