Leases (Maturity Schedule) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating leases
2019	$ 6,877
2020	1,233
2021	1,292
2022	274
2023	205
Thereafter	0
Total minimum lease payments	9,881
Less: imputed interest	876
Total lease liabilities	9,005
Less: current maturities of lease obligations	6,930	$ 12,467
Noncurrent lease obligations	2,075	$ 2,532
2019			$ 13,890
2020			1,330
2021			1,297
2022			278
2023			205
Thereafter			0
Total minimum lease payments			17,000
Financing leases
2019	10,633
2020	392
2021	392
2022	392
2023	116
Thereafter	0
Total minimum lease payments	11,925
Less: imputed interest	305
Total lease liabilities	11,620		11,677
Less: current maturities of lease obligations	10,617
Noncurrent lease obligations	$ 1,003
2019			12,332
2020			0
2021			0
2022			0
2023			0
Thereafter			0
Total minimum lease payments			$ 12,332