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Business Segments (Narrative) (Details) (USD $)	12 Months Ended
Business Segments (Narrative) (Details) (USD $)	Dec. 31, 2010 Mideast Group [Member]	Dec. 31, 2009 Mideast Group [Member]	Dec. 31, 2010 Southeast Group [Member]	Dec. 31, 2011 West Group [Member]
Segment Reporting Information [Line Items]
Land acquired through noncash transactions	$ 1,900,000	$ 125,000	$ 450,000	$ 144,961,000

The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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