SUMMARIZED CONDENSED CONSOLIDATING INFORMATION (Condensed Consolidating Statement of Income) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Rental income	$ 24,820	$ 18,628	$ 48,483	$ 36,190
Interest income	297	177	361	217
Total revenues	25,117	18,805	48,844	36,407
Expenses:
Depreciation and amortization	7,557	6,290	14,860	12,377
Interest	8,148	7,505	15,846	15,103
General and administrative	3,489	2,923	7,810	5,592
(Income) loss in subsidiary	0	0	0	0
Total expenses	19,194	16,718	38,516	33,072
Net income	5,923	2,087	10,328	3,335
Net income per common share, basic (USD per shares)	$ 0.16	$ 0.08	$ 0.28	$ 0.13
Net income per common share, diluted (USD per shares)	$ 0.16	$ 0.08	$ 0.28	$ 0.13
Weighted-average number of common shares outstanding, basic (in shares)	37,147,942	25,154,284	37,092,683	25,140,781
Weighted-average number of common shares outstanding, diluted (in shares)	37,191,687	25,226,179	37,119,005	25,210,575
Parent Company [Member]
Revenues:
Rental income	0	0	0	0
Interest income	1	13	7	41
Total revenues	1	13	7	41
Expenses:
Depreciation and amortization	12	12	24	29
Interest	0	0	0	0
General and administrative	3,083	2,686	6,920	5,315
(Income) loss in subsidiary	(9,017)	(4,772)	(17,265)	(8,638)
Total expenses	(5,922)	(2,074)	(10,321)	(3,294)
Net income	5,923	2,087	10,328	3,335
Issuers [Member]
Revenues:
Rental income	0	0	0	0
Interest income	0	0	0	0
Total revenues	0	0	0	0
Expenses:
Depreciation and amortization	0	0	0	0
Interest	4,757	4,653	9,514	9,403
General and administrative	1	0	2	0
(Income) loss in subsidiary	(13,775)	(9,425)	(26,781)	(18,041)
Total expenses	(9,017)	(4,772)	(17,265)	(8,638)
Net income	9,017	4,772	17,265	8,638
Combined Guarantor Subsidiaries [Member]
Revenues:
Rental income	18,372	12,337	35,586	23,608
Interest income	296	162	354	175
Total revenues	18,668	12,499	35,940	23,783
Expenses:
Depreciation and amortization	5,492	4,173	10,724	8,111
Interest	715	324	1,178	646
General and administrative	376	208	839	211
(Income) loss in subsidiary	55	(105)	(147)	(199)
Total expenses	6,638	4,600	12,594	8,769
Net income	12,030	7,899	23,346	15,014
Combined Non-Guarantor Subsidiaries [Member]
Revenues:
Rental income	6,448	6,291	12,897	12,582
Interest income	0	2	0	1
Total revenues	6,448	6,293	12,897	12,583
Expenses:
Depreciation and amortization	2,053	2,105	4,112	4,237
Interest	2,676	2,528	5,154	5,054
General and administrative	29	29	49	66
(Income) loss in subsidiary	0	0	0	0
Total expenses	4,758	4,662	9,315	9,357
Net income	1,690	1,631	3,582	3,226
Elimination [Member]
Revenues:
Rental income	0	0	0	0
Interest income	0	0	0	0
Total revenues	0	0	0	0
Expenses:
Depreciation and amortization	0	0	0	0
Interest	0	0	0	0
General and administrative	0	0	0	0
(Income) loss in subsidiary	22,737	14,302	44,193	26,878
Total expenses	22,737	14,302	44,193	26,878
Net income	$ (22,737)	$ (14,302)	$ (44,193)	$ (26,878)