Income Taxes (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Current Provision [Abstract]
Unincorporated Business Taxes, Current	$ 578,000		$ 737,000		$ 1,169,000	$ 1,505,000
Local Corporate Tax	0		0		0	0
State Corporate Tax	0		0		0	0
Federal Corporate Tax	0		0		0	0
Total Current Provision	578,000		737,000		1,169,000	1,505,000
Deferred Provision [Abstract]
Unincorporated Business Taxes	(27,000)		(38,000)		15,000	(39,000)
Local Corporate Tax	62,000		87,000		139,000	164,000
State Corporate Tax	110,000		153,000		246,000	289,000
Federal Corporate Tax	365,000		525,000		834,000	993,000
Total Deferred Provision	510,000		727,000		1,234,000	1,407,000
Change in Valuation Allowance	446,000	(1,069,000)	(1,980,000)	(865,000)	(623,000)	(2,845,000)
Total Income Tax Expense/(Benefit)	1,534,000		(516,000)		1,780,000	67,000
Section 754 election tax deduction period					15 years
Initial Deferred Tax Assets	68,700,000				68,700,000
Percentage of Cash Savings Generated by Section 754 to be Distributed (in hundredths)	85.00%				85.00%
Share exchange valuation allowance [Line Items]
Number of class B units exchanged for equivalent class A common shares (in shares)				536,528
Income Tax Additional Disclosure [Abstract]
Change in valuation allowance	(446,000)	1,069,000	1,980,000	865,000	623,000	2,845,000
Liability to Selling and Converting Shareholders	9,783,000				9,783,000		11,218,000
Deferred tax asset	8,278,000	9,239,000	10,559,000	9,324,000	8,278,000	10,559,000
Change in Liability to Selling and Converting Shareholders	(315,000)		2,140,000		658,000	2,257,000
Section 754 [Roll Forward]
Beginning balance	65,401,000	66,224,000	67,072,000	65,468,000	66,224,000	65,468,000
Deferred Tax Expense	(835,000)	(823,000)	(816,000)	(777,000)
Unit exchange				2,381,000
Ending balance	64,566,000	65,401,000	66,256,000	67,072,000	64,566,000	66,256,000
Deferred Tax Assets Other [Roll Forward]
Beginning balance	3,819,000	3,661,000	2,893,000	2,797,000	3,661,000	2,797,000
Deferred Other Tax Expense	320,000	158,000	71,000	96,000
Ending balance	4,139,000	3,819,000	2,964,000	2,893,000	4,139,000	2,964,000
Deferred Tax Assets Valuation Allowance [Roll Forward]
Beginning balance	(59,981,000)	(61,050,000)	(60,641,000)	(59,431,000)	(61,050,000)	(59,431,000)
Change in valuation allowance	(446,000)	1,069,000	1,980,000	865,000	623,000	2,845,000
Unit exchange				(2,075,000)
Ending balance	(60,427,000)	(59,981,000)	(58,661,000)	(60,641,000)	(60,427,000)	(58,661,000)
Deferred tax assets [Roll Forward]
Beginning balance	9,239,000	8,835,000	9,324,000	8,834,000	8,835,000	8,834,000
Deferred Tax Expense	(515,000)	(665,000)	(745,000)	(681,000)
Unit exchange				306,000
Change in valuation allowance	(446,000)	1,069,000	1,980,000	865,000	623,000	2,845,000
Ending balance	8,278,000	9,239,000	10,559,000	9,324,000	8,278,000	10,559,000
Deferred tax liabilities roll forward [Abstract]
Deferred tax liabilities Beginning balance	(72,000)	(13,000)	(50,000)	(51,000)	(13,000)	(51,000)
Deferred Tax Liabilities, Deferred Expense	5,000	(59,000)	19,000	1,000
Deferred tax liabilities ending balance	(67,000)	(72,000)	(31,000)	(50,000)	(67,000)	(31,000)
Class B unit exchange for Company Class A common stock [Member]
Share exchange valuation allowance [Line Items]
Number of class B units exchanged for equivalent class A common shares (in shares)				536,528
Liability to Selling and Converting Shareholders.				2,000,000
Change In Liability To Selling And Converting Shareholders due to stock exchange				$ 1,800,000