Debt (Schedule of Long Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Current Maturities:	$ 80	$ 73
Long-term debt:	146,017	70,017
Total debt	146,097	70,090
Other notes payable
Debt Instrument [Line Items]
Current Maturities:	80	73
Long-term debt:	17	17
Bank revolving credit facility
Debt Instrument [Line Items]
Long-term debt:	$ 146,000	$ 70,000