Leases Maturity Schedules of Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Finance Leases
2019 (Excluding the nine months ended September 30, 2019)	$ 260
2020	991
2021	955
2022	975
2023	992
Later years	7,377
Total lease payments	11,550
Less: imputed interest	(2,589)
Total lease obligations	8,961
Operating Leases
2019 (excluding the nine months ended September 30, 2019)	1,899
2020	7,517
2021	6,702
2022	5,664
2023	4,762
Later years	8,010
Total lease payments	34,554
Less: imputed interest	(4,668)
Total lease obligations	$ 29,886	$ 35,470