Leases (Maturities of Lease Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the three months ended March 31, 2019)	$ 2,396
2019			$ 2,867
2020	2,124		1,276
2021	1,509		757
2022	771		434
2023	265		292
Thereafter	586		398
Total lease payments	7,651		6,024
Less: interest	677
Present value of lease liabilities	6,974		6,024
Finance Leases
2019 (excluding the three months ended March 31, 2019)	1,493
2019			1,768
2020	1,393		973
2021	891		686
2022	283		198
Total lease payments	4,060		3,625
Less: interest	375		346
Present value of lease liabilities	$ 3,685		$ 3,279
Accounting Standards Update 2016-02 [Member]
Operating Leases
Present value of lease liabilities		$ 7,500