Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Long-Term Debt (Components Of Long-Term Debt) (Details) - USD ($)
$ in Thousands
May 28, 2010
Dec. 31, 2017
Dec. 31, 2016
Line Of Credit Facility And Long Term Debt [Line Items]      
5% Senior Subordinated Notes due 2017     $ 22,610
Term note     102
Unamortized discount   $ (814) (814)
Total carrying amount of long-term debt   20,842 21,898
Less current portion     $ (21,898)
Long-term debt, net   20,842  
Unsecured Subordinated Notes, interest rate 5.00%    
Revolving Credit Facility [Member]      
Line Of Credit Facility And Long Term Debt [Line Items]      
Revolving credit facility   $ 20,842