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Revenue Recognition (Disaggregation of Revenue by Market Group) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 277,626	$ 261,297	$ 810,421	$ 783,348
Social Sector
Disaggregation of Revenue [Line Items]
Revenue	239,512	223,963	696,790	671,714
Corporate Sector
Disaggregation of Revenue [Line Items]
Revenue	$ 38,114	$ 37,334	$ 113,631	$ 111,634

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