Earnings Per Share (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 28,261	$ 23,254	$ 83,661	$ 55,913
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 28,261	$ 23,254	$ 83,661	$ 55,913
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,198,778	57,588,168	57,221,174	57,433,477
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	1,429,528	883,024	1,710,972	618,356
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,628,306	58,471,192	58,932,146	58,051,833
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)	$ 0.49	$ 0.40	$ 1.46	$ 0.97
Effect of dilutive securities, Common stock options and restricted stock units (in dollars per share)	(0.01)		(0.04)	(0.01)
Net income per share - diluted	$ 0.48	$ 0.40	$ 1.42	$ 0.96
Continuing Operations [Member]
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 28,195	$ 23,131	$ 83,413	$ 56,575
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 28,195	$ 23,131	$ 83,413	$ 56,575
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,198,778	57,588,168	57,221,174	57,433,477
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	1,429,528	883,024	1,710,972	618,356
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,628,306	58,471,192	58,932,146	58,051,833
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)	$ 0.49	$ 0.40	$ 1.45	$ 0.98
Effect of dilutive securities, Common stock options and restricted stock units (in dollars per share)	(0.01)		(0.04)	(0.01)
Net income per share - diluted	$ 0.48	$ 0.40	$ 1.41	$ 0.97
Discontinued Operations [Member]
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 66	$ 123	$ 248	$ (662)
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 66	$ 123	$ 248	$ (662)
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,198,778	57,588,168	57,221,174	57,433,477
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	1,429,528	883,024	1,710,972	618,356
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,628,306	58,471,192	58,932,146	58,051,833
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)			$ 0.01	$ (0.01)
Net income per share - diluted			$ 0.01	$ (0.01)