Weighted-Average Number of Shares Used in Computing Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Weighted average basic shares outstanding (in shares)	12,200,000	12,100,000	12,200,000	12,100,000
Plus: Dilutive impact of employee stock awards (in shares)	200,000	200,000	300,000	200,000
Weighted average diluted shares outstanding (in shares)	12,400,000	12,300,000	12,500,000	12,200,000
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive shares (in shares)			0	0