Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	$ 111,148	$ 112,854
Accumulated amortization, amortizing intangible assets	82,660	79,522
Net carrying amount, amortizing intangible assets	28,488	33,332
Gross carrying amount, non-amortizing intangible assets	116,248	117,954
Accumulated amortization, non-amortizing intangible assets	33,588	38,432
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, non-amortizing intangible assets	5,100	5,100
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	97,849	99,613
Accumulated amortization, amortizing intangible assets	78,935	76,808
Net carrying amount, amortizing intangible assets	18,914	22,805
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	9,898	9,855
Accumulated amortization, amortizing intangible assets	1,481	653
Net carrying amount, amortizing intangible assets	8,417	9,202
Acquired software
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	3,401	3,386
Accumulated amortization, amortizing intangible assets	2,244	2,061
Net carrying amount, amortizing intangible assets	$ 1,157	$ 1,325