Loan Agreement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Credit Facility (Textual) [Abstract]
Proceeds from (Repayments of) Lines of Credit	$ 8,189	$ 2,308
Line of Credit Facility, Remaining Borrowing Capacity	87,500
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 147	$ 167
Weighted average interest rate	4.04%
Stock Repurchase Program, Authorized Amount	$ 7,500
Default limit of other cross indebtedness	5,000
Revolving Credit Facility [Member]
Credit Facility (Textual) [Abstract]
JP Morgan Credit Agreement Limit	100,000
JP Morgan Agreement Potential Future Credit Limit	150,000
Line of Credit [Member] | Revolving Credit Facility [Member]
Credit Facility (Textual) [Abstract]
Long-term Debt	$ 10,500