Business Acquisitions (Intangible Assets Acquired) (Details) - LTG $ in Thousands	Jan. 01, 2019 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 116,200
Estimated useful life	8 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 95,200
Estimated useful life	10 years
Noncompete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 21,000
Estimated useful life	3 years