Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended				3 Months Ended
	Apr. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Nov. 30, 2020	Mar. 31, 2021	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 454,382	$ 454,728		$ 454,382
Payment of holdbacks					2,792	$ 0
Schaudt | Subsequent Event
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%
Purchase price	$ 30,000
Ranch Hand | Subsequent Event
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%
Purchase price	$ 57,400
Contingent consideration maximum	$ 3,000
Wolfpack
Business Acquisition [Line Items]
Purchase price		2,800
Goodwill		$ 2,000			2,000
Veada
Business Acquisition [Line Items]
Percentage of interests acquired			100.00%
Purchase price			$ 69,000
Consideration, holdback payment liability			$ 12,200
Consideration, holdback payment liability, term			2 years
Payment of holdbacks					2,300
Veada | Other Current Liabilities
Business Acquisition [Line Items]
Consideration, holdback payment liability					8,200
Veada | Other Noncurrent Liabilities
Business Acquisition [Line Items]
Consideration, holdback payment liability					1,800
Challenger
Business Acquisition [Line Items]
Purchase price				$ 35,000
Consideration, holdback payment liability				$ 4,500
Consideration, holdback payment liability, term				2 years
Challenger | Other Current Liabilities
Business Acquisition [Line Items]
Consideration, holdback payment liability					3,500
Challenger | Other Noncurrent Liabilities
Business Acquisition [Line Items]
Consideration, holdback payment liability					$ 1,000