Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets, Gross [Abstract]
Federal net operating carryforwards	$ 26,884	$ 29,222
State net operating loss carryforwards	20,759	20,888
Impairment losses	151,050	150,514
Prepaid income from land sales	10,210	10,262
Other	4,697	4,968
Total gross deferred tax assets	213,600	215,854
Valuation allowance	(93,058)	(95,276)
Total net deferred tax assets	120,542	120,578
Deferred Tax Liabilities, Gross [Abstract]
Investment in real estate and property and equipment basis differences	1,726	2,055
Deferred gain on land sales and involuntary conversions	31,385	32,255
Prepaid pension asset	15,596	16,173
Installment sale	58,969	58,138
Total gross deferred tax liabilities	107,676	108,621
Net deferred tax asset	$ 12,866	$ 11,957