Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Mar. 31, 2013
Debt Instrument [Line Items]
Total debt	$ 213,600,000	$ 214,007,000
Less current maturities	400,000	409,000
Total long-term debt	213,200,000	213,598,000
Senior Subordinated 6.25% Notes
Debt Instrument [Line Items]
Total debt	210,000,000	210,000,000
Senior Subordinated Notes, interest rate	6.25%		6.25%
Other debt
Debt Instrument [Line Items]
Total debt	$ 3,600,000	$ 4,007,000