Earnings Per Share (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 23,254	$ 20,425	$ 55,913	$ 49,705
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 23,254	$ 20,425	$ 55,913	$ 49,705
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,588,168	56,907,815	57,433,477	56,712,084
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	883,024	505,482	618,356	440,287
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,471,192	57,413,297	58,051,833	57,152,371
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)	$ 0.40	$ 0.36	$ 0.97	$ 0.87
Effect of dilutive securities, Common stock options and restricted stock units (in dollars per share)			(0.01)
Net income per share - diluted	$ 0.40	$ 0.36	$ 0.96	$ 0.87
Continuing Operations [Member]
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 23,131	$ 20,399	$ 56,575	$ 48,404
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 23,131	$ 20,399	$ 56,575	$ 48,404
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,588,168	56,907,815	57,433,477	56,712,084
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	883,024	505,482	618,356	440,287
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,471,192	57,413,297	58,051,833	57,152,371
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)	$ 0.40	$ 0.36	$ 0.98	$ 0.85
Effect of dilutive securities, Common stock options and restricted stock units (in dollars per share)			(0.01)
Net income per share - diluted	$ 0.40	$ 0.36	$ 0.97	$ 0.85
Discontinued Operations [Member]
Income (numerator) [Abstract]
Net earnings (loss) available to common shareholders	$ 123	$ 26	$ (662)	$ 1,301
Diluted earnings (loss) per share, Net income (loss) available to common shareholders	$ 123	$ 26	$ (662)	$ 1,301
Shares (denominator) [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	57,588,168	56,907,815	57,433,477	56,712,084
Effect of dilutive securities, Common stock options and restricted stock units (in shares)	883,024	505,482	618,356	440,287
Diluted earnings (loss) per share, Net income (loss) available to common shareholders (in shares)	58,471,192	57,413,297	58,051,833	57,152,371
Per share amount [Abstract]
Basic earnings (loss) per share, Net income (loss) available to common shareholders (in dollars per share)			$ (0.01)	$ 0.02
Net income per share - diluted			$ (0.01)	$ 0.02