Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets 1 (Details)

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Goodwill and Intangible Assets 1 (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 18,488 $ 26,163 $ 31,232