Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Intangible Assets - (Intangibles Subject to Amortization) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 549,671 $ 547,988
Accumulated amortization (169,786) (156,009)
Net carrying amount 379,885 391,979
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 408,267 408,267
Accumulated amortization (103,679) (95,167)
Net carrying amount 304,588 313,100
Other amortizable intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 141,404 139,721
Accumulated amortization (66,107) (60,842)
Net carrying amount $ 75,297 $ 78,879