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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
The following schedule discloses the changes in the carrying value of goodwill:
Three Months endedSix Months ended
(Dollars in thousands)June 30,
2021		June 30,
2020		June 30,
2021		June 30,
2020
Net carrying value at beginning of period$514,013 513,355 514,013 456,418 
Acquisitions and adjustments— — — 56,937 
Net carrying value at end of period$514,013 513,355 514,013 513,355