Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	$ 110,919	$ 112,854
Accumulated amortization, amortizing intangible assets	80,337	79,522
Net carrying amount, amortizing intangible assets	30,582	33,332
Gross carrying amount, non-amortizing intangible assets	116,019	117,954
Accumulated amortization, non-amortizing intangible assets	35,682	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	97,870	99,613
Accumulated amortization, amortizing intangible assets	77,171	76,808
Net carrying amount, amortizing intangible assets	20,699	22,805
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	9,730	9,855
Accumulated amortization, amortizing intangible assets	1,051	653
Net carrying amount, amortizing intangible assets	8,679	9,202
Acquired software
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, amortizing intangible assets	3,319	3,386
Accumulated amortization, amortizing intangible assets	2,115	2,061
Net carrying amount, amortizing intangible assets	$ 1,204	$ 1,325