Leases (Schedule of Maturities of Lease Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating leases
2019	$ 1,316
2020	4,603
2021	3,497
2022	2,471
2023	1,495
Thereafter	3,054
Total lease payments	16,436
Less imputed interest	(2,525)
Total	13,911
Finance lease
2019	686
2020	2,790
2021	2,790
2022	2,838
2023	3,004
Thereafter	15,512
Total lease payments	27,620
Less imputed interest	(8,430)
Total	19,190	$ 25,900
Salt Lake City, Utah [Member]
Finance lease
2019	2,451
2020	2,974
2021	2,990
2022	3,054
2023	3,277
Thereafter	18,930
Total lease payments	33,676
Less imputed interest	(7,790)
Total	$ 25,886