Debt Debt (Details) (USD $)	12 Months Ended						3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Low Range Uncommitted Letter of Credit [Member]	Dec. 31, 2013 High Range Uncommittted Letter of Credit [Member]	Sep. 29, 2013 High Range Uncommittted Letter of Credit [Member]	Sep. 30, 2013 New Unsecured Credit Facility [Member] [Member]	Dec. 31, 2013 New Unsecured Credit Facility [Member] [Member]	Dec. 31, 2013 Prior Credit Facility [Member]	Dec. 31, 2013 Minimum [Member] New Unsecured Credit Facility [Member] [Member]	Dec. 31, 2013 Maximum [Member] New Unsecured Credit Facility [Member] [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity								$ 200,000,000
Sub-limit for letters of credit								100,000,000
Line of Credit Facility, Expiration Date							Jul. 18, 2016
Line of Credit Facility, Maximum Borrowing Capacity								225,000,000	140,000,000
Credit Facility, Basis Spread on Variable Rate										2.25%	3.25%
Optional increase in borrowing availability								25,000,000
Leverage ratio	60.00%
Unsold owned land threshold	125.00%
Maximum Investment in unrestricted subsidiaries and JVs threshold	30.00%
Interest Coverage Ratio	1.50
Gains (Losses) on Extinguishment of Debt	(1,726,000)	0	0
Debt Instrument, Unused Borrowing Capacity, Amount	334,247,000
Line of Credit Facility, Amount Outstanding	0
letters of credit outstanding under credit facility	12,437,000
Maximum borrowing availability subject to limit	187,600,000
Number of Secured Letters of Credit Outstanding under Credit Facility	3
Maximum Available Amounts under Letter of Credit Facilities				5,000,000	10,000,000	8,000,000
Letters of Credit Outstanding Under Letter of Credit Facilities	13,395,000	8,345,000
Aggregate Capacity of Secured Letters of Credit under Credit Facility	20,000,000
Uncommitted Letters of Credit	1,300,000
Restricted Cash for Secured Letter of Credit Agreements	$ 13,711,000	$ 8,527,000