Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ 6,522	$ 8,501
Weighted-average shares outstanding for basic earnings per share (in shares)	64,148,000	63,810,000
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	993,000	714,000
Weighted-average shares outstanding assuming dilution (in shares)	65,141,000	64,524,000
Basic earnings per share from continuing operations (in dollars per share)	$ 0.10	$ 0.13
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.10	$ 0.13
Anti-dilutive securities excluded from computation of earnings per share (in shares)	0	0