Leases Maturity Schedules of Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Finance Leases
2019 (excluding the six months ended June 30, 2019)	$ 518
2020	991
2021	955
2022	975
2023	992
Later years	7,377
Total lease payments	11,808
Less: imputed interest	(2,694)
Total lease obligations	9,114
Operating Leases
2019 (excluding the six months ended June 30, 2019)	4,429
2020	7,579
2021	6,738
2022	5,699
2023	4,789
Later years	8,062
Total lease payments	37,296
Less: imputed interest	(5,085)
Total lease obligations	$ 32,211	$ 35,470