Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Schedule Of Long-Term Debt) (Details)

v3.8.0.1
Long-Term Debt (Schedule Of Long-Term Debt) (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Senior Notes $ 95,000,000 $ 95,000,000
Revolving credit facility 0 9,975,000
Total long-term debt 95,000,000 104,975,000
Less: Current maturities (50,000,000) 0
Total maturities due after one year $ 45,000,000 $ 104,975,000