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STOCKHOLDERS' EQUITY - Warrants (Details) - $ / shares					1 Months Ended	3 Months Ended
	Mar. 09, 2016	Dec. 08, 2015	Aug. 03, 2015	Nov. 01, 2010	Nov. 30, 2010	Mar. 31, 2016	Dec. 31, 2014
Class of Stock [Line Items]
Exercise price of warrants for non-voting common stock				$ 11.00		$ 8.90
Cor Advisors Llc
Class of Stock [Line Items]
Warrants issued				1,395,000
Exercise price of warrants for non-voting common stock				$ 11.00
Common Stock | Class B Common Stock
Class of Stock [Line Items]
Issuance of shares of voting common stock			70,690
Common Stock | Class A Common Stock
Class of Stock [Line Items]
Issuance of shares of voting common stock			70,690			5,881,766
Tcw Shared Opportunity Fund
Class of Stock [Line Items]
Warrants issued				240,000	240,000		240,000
Exercise price of warrants for non-voting common stock			$ 9.13	$ 11.00
Warrant exercisable period				5 years	5 years
President And Chief Executive Officer | Cor Advisors Llc
Class of Stock [Line Items]
Warrants issued				960,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on October 1, 2011
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on January 1, 2012
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on April 1, 2012
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on July 1, 2012
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on October 1, 2012
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on January 1, 2013
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on April 1, 2013
Class of Stock [Line Items]
Warrants issued				50,000
President And Chief Executive Officer | Cor Advisors Llc | Vested on July 1, 2013
Class of Stock [Line Items]
Warrants issued				50,000
Vice President and Chief Lending Officer
Class of Stock [Line Items]
Exercise price of warrants for non-voting common stock	$ 8.90	$ 9.04
Vice President and Chief Lending Officer | Cor Advisors Llc
Class of Stock [Line Items]
Warrants issued				435,000		210,000
Issuance of shares of voting common stock	53,711	37,355
Warrants exercised	130,000	95,000
Vice President and Chief Lending Officer | Cor Advisors Llc | Vested on October 1, 2011
Class of Stock [Line Items]
Warrants issued				80,000
Vice President and Chief Lending Officer | Cor Advisors Llc | Vested on January 1, 2011
Class of Stock [Line Items]
Warrants issued				95,000
Vice President and Chief Lending Officer | Cor Advisors Llc | Vested on April 1, 2011
Class of Stock [Line Items]
Warrants issued				130,000
Vice President and Chief Lending Officer | Cor Advisors Llc | Vested on July 1, 2011
Class of Stock [Line Items]
Warrants issued				130,000

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Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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-Name Accounting Standards Codification
-Topic 235
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-Section S99
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-Topic 505
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