Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - (Intangibles Subject to Amortization) (Details)

v3.19.3
Intangible Assets - (Intangibles Subject to Amortization) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 540,097 $ 531,026
Accumulated amortization (141,054) (95,020)
Net carrying amount 399,043 436,006
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 408,267 408,267
Accumulated amortization (85,229) (55,417)
Net carrying amount 323,038 352,850
Other amortizable intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 131,830 122,759
Accumulated amortization (55,825) (39,603)
Net carrying amount $ 76,005 $ 83,156