Intangible Assets, Goodwill and Other Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Finite lived intangible assets
Gross Carrying Amount	$ 313,102		$ 313,102		$ 310,589
Accumulated Amortization	(137,642)		(137,642)		(119,949)
Net Carrying Amount	175,460		175,460		190,640
Amortization expense	9,000	$ 9,000	18,000	$ 18,000
Customer relationships
Finite lived intangible assets
Gross Carrying Amount	268,178		268,178		265,665
Accumulated Amortization	(101,688)		(101,688)		(88,550)
Net Carrying Amount	166,490		166,490		177,115
Software & technology
Finite lived intangible assets
Gross Carrying Amount	31,600		31,600		31,600
Accumulated Amortization	(23,012)		(23,012)		(19,999)
Net Carrying Amount	8,588		8,588		11,601
Trademarks & other
Finite lived intangible assets
Gross Carrying Amount	13,324		13,324		13,324
Accumulated Amortization	(12,942)		(12,942)		(11,400)
Net Carrying Amount	$ 382		$ 382		$ 1,924