Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Repurchased During Period, Shares			3,825,554
Accelerated Share Repurchases, Cash or Stock Settlement			50000
Accelerated Share Repurchases, Final Price Paid Per Share			$ 13.07
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ 2,116	$ 6,347	$ 21,815	$ 25,812
Weighted-average shares outstanding for basic earnings per share (in shares)	59,379,000	64,239,000	62,084,000	64,411,000
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	904,000	932,000	1,940,000	930,000
Weighted-average shares outstanding assuming dilution (in shares)	60,283,000	65,171,000	64,024,000	65,341,000
Basic earnings per share from continuing operations (in dollars per share)	$ 0.04	$ 0.10	$ 0.35	$ 0.40
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.04	$ 0.10	$ 0.34	$ 0.40
Anti-dilutive securities excluded from computation of earnings per share (in shares)	3,342,000		1,114,000