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Business Acquisitions (Intangible Assets Acquired) (Details) - LTG
$ in Thousands
Jan. 01, 2019
USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]  
Other intangible assets $ 106,600
Estimated useful life 8 years
Customer relationships  
Acquired Finite-Lived Intangible Assets [Line Items]  
Other intangible assets $ 86,300
Estimated useful life 10 years
Noncompete agreements  
Acquired Finite-Lived Intangible Assets [Line Items]  
Other intangible assets $ 20,300
Estimated useful life 3 years