Leases (Maturities of Lease Liabilities under ASC 840) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019, Capital Leases	$ 399
2020, Capital Leases	331
2021, Capital Leases	279
2022, Capital Leases	279
2023, Capital Leases	279
Thereafter, Capital Leases	976
Net minimum lease payments, Capital Leases	2,543
Less amount representing imputed interest and executory costs	712
Present value of net minimum lease payments	1,831
Less current portion	253
Long-term obligations at end of period	1,578
2019, Operating Leases	9,643
2020, Operating Leases	6,375
2021, Operating Leases	4,650
2022, Operating Leases	2,889
2023, Operating Leases	1,781
Thereafter, Operating Leases	2,368
Net minimum lease payments, Operating Leases	$ 27,706