Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax assets:
Accrued expenses	$ 600	$ 525
Deferred revenues	371	512
Capitalization of costs	2,151	1,758
Pension adjustment	2,923	4,262
Stock grant expense	2,660	7,005
State deferred taxes	2	777
Book deferred gains	1,416	963
Provision for additional capitalized costs	1,003	1,003
Other	1,208	73
Total deferred income tax assets	12,334	16,878
Deferred income tax liabilities:
Deferred gains	1,390	1,390
Depreciation	3,495	3,374
Cost of sales allocations	1,252	1,252
Joint venture allocations	2,001	2,084
Straight line rent	1,006	1,063
Prepaid expenses	406	212
State deferred taxes	444	345
Other	296	785
Total deferred income tax liabilities	10,290	10,505
Net deferred income tax asset	2,044	6,373
Allowance for deferred tax assets	0	0
Net deferred taxes	$ 2,044	$ 6,373