Real Estate and Accumulated Depreciation (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,244
Land	132,553
Buildings & improvements	36,531
Costs Capitalized Subsequent to Acquisition	249,111	[1]
Land & Land Improvements	317,272
Building & Improvements	100,923
Total	418,197
Accumulated Depreciation	49,772		44,489
Bay County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,496
Land	2,437
Buildings & improvements	8,407
Costs Capitalized Subsequent to Acquisition	41,829	[1]
Land & Land Improvements	44,266
Building & Improvements	8,407
Total	52,673
Accumulated Depreciation	444
Bay County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Land	13,639
Buildings & improvements	11,873
Costs Capitalized Subsequent to Acquisition	1,038	[1]
Land & Land Improvements	14,121
Building & Improvements	12,429
Total	26,550
Accumulated Depreciation	4,192
Bay County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Land	21,639
Buildings & improvements	1,300
Costs Capitalized Subsequent to Acquisition	17,930	[1]
Land & Land Improvements	43,306
Total	40,869
Bay County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	3,896
Costs Capitalized Subsequent to Acquisition	11,284	[1]
Land & Land Improvements	15,180
Total	15,180
Accumulated Depreciation	160
Bay County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	2,646
Land & Land Improvements	2,646
Total	2,646
Calhoun County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	1,774
Costs Capitalized Subsequent to Acquisition	4,643	[1]
Land & Land Improvements	6,417
Total	6,417
Accumulated Depreciation	68
Calhoun County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	927
Costs Capitalized Subsequent to Acquisition	698	[1]
Land & Land Improvements	1,625
Total	1,625
Duval County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	185
Costs Capitalized Subsequent to Acquisition	(3)	[1]
Land & Land Improvements	182
Total	182
Duval County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Accumulated Depreciation	3
Franklin County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	44
Land & Land Improvements	44
Total	44
Accumulated Depreciation	14
Franklin County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Land	69
Buildings & improvements	1,582
Costs Capitalized Subsequent to Acquisition	(718)	[1]
Land & Land Improvements	147
Building & Improvements	786
Total	933
Accumulated Depreciation	70
Franklin County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Land	7,567
Land & Land Improvements	7,567
Total	7,567
Accumulated Depreciation	843
Franklin County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	1,241
Costs Capitalized Subsequent to Acquisition	1,208	[1]
Land & Land Improvements	2,449
Total	2,449
Accumulated Depreciation	26
Franklin County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	210
Costs Capitalized Subsequent to Acquisition	9	[1]
Land & Land Improvements	219
Total	219
Gadsden County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	1,050
Land & Land Improvements	1,050
Total	1,050
Gadsden County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	1,302
Costs Capitalized Subsequent to Acquisition	135	[1]
Land & Land Improvements	1,437
Total	1,437
Accumulated Depreciation	15
Gadsden County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	135
Land & Land Improvements	135
Total	135
Gulf County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	1,663
Buildings & improvements	1,087
Costs Capitalized Subsequent to Acquisition	3,078	[1]
Land & Land Improvements	4,741
Building & Improvements	1,087
Total	5,828
Accumulated Depreciation	200
Gulf County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Land	2,843
Buildings & improvements	7,115
Costs Capitalized Subsequent to Acquisition	9,743	[1]
Land & Land Improvements	2,807
Building & Improvements	16,894
Total	19,701
Accumulated Depreciation	8,495
Gulf County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Land	26,707
Buildings & improvements	526
Costs Capitalized Subsequent to Acquisition	6,275	[1]
Land & Land Improvements	33,508
Total	33,508
Gulf County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	5,238
Costs Capitalized Subsequent to Acquisition	15,375	[1]
Land & Land Improvements	20,613
Total	20,613
Accumulated Depreciation	214
Gulf County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	506
Costs Capitalized Subsequent to Acquisition	969	[1]
Land & Land Improvements	1,475
Total	1,475
Jefferson County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	721
Costs Capitalized Subsequent to Acquisition	(8)	[1]
Land & Land Improvements	713
Total	713
Accumulated Depreciation	8
Jefferson County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	193
Costs Capitalized Subsequent to Acquisition	29	[1]
Land & Land Improvements	222
Total	222
Leon County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	1,880
Costs Capitalized Subsequent to Acquisition	651	[1]
Land & Land Improvements	2,531
Total	2,531
Accumulated Depreciation	28
Leon County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Costs Capitalized Subsequent to Acquisition	20,689	[1]
Land & Land Improvements	8,651
Building & Improvements	12,038
Total	20,689
Accumulated Depreciation	9,159
Leon County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,346
Buildings & improvements	58
Costs Capitalized Subsequent to Acquisition	11,825	[1]
Land & Land Improvements	11,883
Total	11,883
Leon County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	923
Costs Capitalized Subsequent to Acquisition	941	[1]
Land & Land Improvements	1,864
Total	1,864
Accumulated Depreciation	20
Leon County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Costs Capitalized Subsequent to Acquisition	487	[1]
Land & Land Improvements	487
Total	487
Liberty County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Buildings & improvements	611
Costs Capitalized Subsequent to Acquisition	189	[1]
Building & Improvements	800
Total	800
Accumulated Depreciation	350
Liberty County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	2,587
Buildings & improvements	205
Costs Capitalized Subsequent to Acquisition	196	[1]
Land & Land Improvements	2,988
Total	2,988
Accumulated Depreciation	215
St. Johns County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	435
Land & Land Improvements	435
Total	435
St. Johns County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Buildings & improvements	255
Costs Capitalized Subsequent to Acquisition	448	[1]
Land & Land Improvements	300
Building & Improvements	403
Total	703
Accumulated Depreciation	268
St. Johns County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,402
Land	10,855
Costs Capitalized Subsequent to Acquisition	4,750	[1]
Land & Land Improvements	15,605
Total	15,605
Wakulla County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Buildings & improvements	5
Building & Improvements	5
Total	5
Accumulated Depreciation	5
Wakulla County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	457
Costs Capitalized Subsequent to Acquisition	(32)	[1]
Land & Land Improvements	425
Total	425
Accumulated Depreciation	5
Wakulla County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	16
Costs Capitalized Subsequent to Acquisition	47	[1]
Land & Land Improvements	63
Total	63
Walton County, Florida | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	56
Costs Capitalized Subsequent to Acquisition	3,063	[1]
Land & Land Improvements	3,119
Total	3,119
Walton County, Florida | Building
Real Estate and Accumulated Depreciation [Line Items]
Buildings & improvements	3,471
Costs Capitalized Subsequent to Acquisition	67,319	[1]
Land & Land Improvements	22,855
Building & Improvements	47,935
Total	70,790
Accumulated Depreciation	24,856
Walton County, Florida | Residential
Real Estate and Accumulated Depreciation [Line Items]
Land	5,227
Costs Capitalized Subsequent to Acquisition	30,756	[1]
Land & Land Improvements	35,546
Total	35,983
Walton County, Florida | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	354
Costs Capitalized Subsequent to Acquisition	988	[1]
Land & Land Improvements	1,342
Total	1,342
Accumulated Depreciation	14
Walton County, Florida | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	1,105
Land & Land Improvements	1,105
Total	1,105
Other Florida Counties | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	201
Land & Land Improvements	201
Total	201
Accumulated Depreciation	2
Other Florida Counties | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	79
Costs Capitalized Subsequent to Acquisition	60	[1]
Land & Land Improvements	139
Total	139
Georgia | Land With Infrastructure
Real Estate and Accumulated Depreciation [Line Items]
Land	4,800
Land & Land Improvements	4,800
Total	4,800
Accumulated Depreciation	49
Georgia | Building
Real Estate and Accumulated Depreciation [Line Items]
Buildings & improvements	36
Costs Capitalized Subsequent to Acquisition	103	[1]
Building & Improvements	139
Total	139
Accumulated Depreciation	47
Georgia | Timberlands
Real Estate and Accumulated Depreciation [Line Items]
Land	6,895
Costs Capitalized Subsequent to Acquisition	(6,883)	[1]
Land & Land Improvements	12
Total	12
Accumulated Depreciation	2
Georgia | Unimproved Land
Real Estate and Accumulated Depreciation [Line Items]
Land	51
Land & Land Improvements	51
Total	$ 53

[1] Includes cumulative impairments.