Earnings per Share (Schedule of Computation of Basic and Diluted Earnings per Share) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Income from continuing operations	$ 17,598	$ 31,334	$ 24,457	$ 9,902	$ 15,043	$ 21,951	$ 18,803	$ 4,131	$ 83,291	$ 59,928	$ 54,112
(Loss) income from discontinued operations	(26,143)	2,426	2,835	2,157	(686)	2,525	1,110	2,214	(18,725)	5,163	9,697
Net income	$ (8,545)	$ 33,760	$ 27,292	$ 12,059	$ 14,357	$ 24,476	$ 19,913	$ 6,345	$ 64,566	$ 65,091	$ 63,809
Weighted average shares outstanding (in shares)									32,664	32,389	31,979
Common stock options and restricted stock (in shares)									254	333	555
Weighted average shares and conversions (in shares)									32,918	32,722	32,534