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Summary of Significant Accounting Policies (Other Intangible Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquisition cost | $ 89,628 | $ 88,470
Accumulated amortization | (31,506) | (26,438)
Intangible Assets, Net (Excluding Goodwill), Total | 58,122 | 62,032
Customer Lists [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquisition cost | 50,750 | 52,200
Accumulated amortization | (17,466) | (14,549)
Intangible Assets, Net (Excluding Goodwill), Total | 33,284 | 37,651
Trade Names [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquisition cost | 20,041 | 20,689
Accumulated amortization | (6,687) | (5,884)
Intangible Assets, Net (Excluding Goodwill), Total | 13,354 | 14,805
Technology [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquisition cost | 15,231 | 15,581
Accumulated amortization | (7,353) | (6,005)
Intangible Assets, Net (Excluding Goodwill), Total | 7,878 | $ 9,576
Capitalized Software Development [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Acquisition cost | 3,606 |
Intangible Assets, Net (Excluding Goodwill), Total | $ 3,606 |

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