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Leases (Tables)
3 Months Ended
Mar. 31, 2019
Leases [Abstract]  
Maturities of lease liabilities
  
Operating
(dollars in thousands)Leases
2019$     1,367
20201,862
20211,907
20221,151
20231,020
Thereafter12,331
Total undiscounted lease payments19,639
Discount effect of cash flows4,174
Total lease liability$15,465