Fair Value Disclosures (Tables)

6 Months Ended

Jun. 30, 2011

Notes to Financial Statements [Abstract]

Assets and liabilities measured at fair value on a recurring basis

For assets and liabilities measured at fair value on a recurring basis, quantitative disclosure of the fair value for each major category of assets and liabilities is presented below:

	Fair Value Measurements as of June 30, 2011 Using				Fair Value Measurements as of December 31, 2010 Using
Description	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Available-for-sale securities	$	2,233			$	2,061
Derivative interest rate contract			$	3,012			$	4,856
Insurance deposit	10,900				10,135
Total assets	$	13,133	$	3,012	$	12,196	$	4,856
Derivative interest rate contract							$	(291	)
Total liabilities							$	(291	)

Estimated fair value of notes payable

The estimated fair values of notes payable at June 30, 2011 and December 31, 2010 are as follows:

	2011				2010
	Carrying Value		Fair Value		Carrying Value		Fair Value
Notes payable	$	2,504,342	$	2,501,310	$	2,656,560	$	2,616,986