Cost and Fair Value Basis of Long-Term Debt

6 Months Ended

Jun. 30, 2011

Disclosure Cost And Fair Value Basis Of Long Term Debt [Abstract]

Cost and Fair Value Basis of Long-Term Debt Text Block

7.       Cost and Fair Value Basis of Long-Term Debt

Cost of Long-Term Debt

Our long-term debt consists of secured medium-term notes (MTNs) with maturity dates from 2012 through 2035, interest rates ranging from 3.95 percent to 9.05percent, and a weighted-average coupon rate of 6.16 percent. For the six months ended June 30, 2011, we redeemed $10 million of MTNs. For more detail on our outstanding long-term debt, see Note 7 in our 2010 Form 10-K.

Fair Value of Long-Term Debt

The following table provides an estimate of the fair value of our long-term debt, including current maturities of long-term debt, using market prices in effect on the valuation date.  Because our debt outstanding does not trade in active markets, we used interest rates ofother companiesoutstanding debt issues that actively trade and have similar credit ratings, terms and remaining maturities to estimate fair value of our long-term debt issues. These are significant other observable inputs, or level 2 inputs, in the fair value hierarchy.

	June 30,					December 31,
Thousands		2011		2010		2010
Carrying amount	$	591,700	$	636,700	$	601,700
Estimated fair value	$	678,281	$	728,172	$	690,126