Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Change in Carrying Amount of Goodwill (Details)

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Goodwill and Intangible Assets - Change in Carrying Amount of Goodwill (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Goodwill [Roll Forward]  
Beginning balance $ 1,053,119
Measurement period adjustments (394)
Ending balance $ 1,052,725