Leases (Schedule of Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating leases
Right of use assets included in Other assets	$ 18,223
Operating lease liabilities current	4,023
Operating lease liabilities noncurrent	14,386
Total operating lease liabilities	18,409
Finance lease
Right of use assets included in Property, plant and equipment, net	15,689
Finance lease liabilities current	1,835
Finance lease liabilities noncurrent	22,700
Total finance lease liabilities	24,535	$ 25,900
Accrued liabilities [Member]
Operating leases
Operating lease liabilities current	4,023
Finance lease
Finance lease liabilities current	1,835
Other Noncurrent Liabilities [Member]
Operating leases
Operating lease liabilities noncurrent	14,386
Finance lease
Finance lease liabilities noncurrent	$ 22,700