Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangibles - Other intangible assets (Details)

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Goodwill and Other Intangibles - Other intangible assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Other intangible assets      
Gross Definite-lived intangible assets $ 218,882   $ 218,882
Accumulated Amortization (24,668)   (19,495)
Net definite-lived intangible assets 194,214   199,387
Other intangible assets, net 194,214   $ 199,387
Amortization expense $ 5,200 $ 1,300