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, 2021
Mar. 31, 2020
Dec. 31, 2020
Other intangible assets      
Gross Definite-lived intangible assets $ 273,801   $ 252,751
Accumulated Amortization (68,288)   (62,146)
Net definite-lived intangible assets 205,513   $ 190,605
Amortization expense $ 6,143 $ 5,272