Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Weighted average common shares outstanding—basic (in shares)	26,011,000	25,777,000	25,957,000	25,690,000
Dilutive effect of stock-based awards (in shares)	271,000	0	214,000	195,000
Dilutive effect of convertible senior notes (in shares)	454,000	0	235,000	0
Weighted average common shares outstanding—diluted (in shares)	26,736,000	25,777,000	26,406,000	25,885,000
Antidilutive securities excluded from computation of earnings per share, amount	13,000	4,000	138,000	3,000