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Intangible Assets, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Finite-Lived Intangible Assets [Line Items] |  |
Original amounts: | $ 171,489 | $ 149,077
Accumulated amortization: | 120,361 | 107,598
Intangible assets, net | 51,128 | 41,479
Capitalized software costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amounts: | 82,878 | 78,793
Accumulated amortization: | 70,326 | 66,123
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amounts: | 70,032 | 54,850
Accumulated amortization: | 40,550 | 33,578
Backlog and non-compete agreement [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amounts: | 2,712 | 2,712
Accumulated amortization: | 2,712 | 2,674
Acquired technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amounts: | 15,867 | 12,722
Accumulated amortization: | $ 6,773 | $ 5,223

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