Fair Value Measurements (Details Textuals) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Assets	$ 2,800	$ 2,200
Derivative Liabilities	12,400	23,300
Fair Value, Inputs, Level 2 [Member]
Cash Equivalents	18,000	14,300
Change in Carrying Value Verse Fair Value of Long Term Debt	39,600
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Assets	2,849	2,227
Derivative Liabilities	$ 12,427	$ 23,291