Accounting Policies - Net Income (Loss) Per Common Share (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Weighted-average common shares outstanding—basic (in shares)	15,458,810	15,359,445	15,222,462
Dilutive effect of stock-based compensation awards outstanding (in shares)	0	522,931	0
Weighted-average common shares outstanding—diluted (in shares)	15,458,810	15,882,376	15,222,462
Dilutive securities outstanding, not included in the computation	1,300,000	2,100,000	1,800,000