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Leases - Lease Cost and Other Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Leases [Abstract]    
Operating lease cost $ 1,419 $ 2,802
Variable lease expense 371 694
Amortization costs related to the intangible assets and liabilities $ 118 237
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases (in thousands)   $ 1,596
Weighted Average Remaining Lease Term 47 years 47 years
Weighted Average Discount Rate 4.96% 4.96%