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RELATED-PARTY TRANSACTIONS - Transaction with TWC Shared Opportunity Fund V, L.P., a Greater than 5 percent Shareholder (Details) |  |  |  |  |  | 1 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 16, 2015 shares | Jan. 20, 2015 shares | Jan. 05, 2015 shares | Jun. 03, 2013 shares | Nov. 01, 2010 shares | Aug. 07, 2015 shares | Nov. 30, 2010 shares | Jun. 30, 2015 shares | Dec. 10, 2014 | May. 29, 2013
Tcw Shared Opportunity Fund |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Warrant exercisable period |  |  |  |  | 5 years |  | 5 years |  |  |
Warrants issued |  |  |  |  | 240,000 |  | 240,000 |  |  |
Conversion ratio |  |  |  |  |  |  |  |  | 1 |
Tcw Shared Opportunity Fund | Class A Common Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum ownership percentage by noncontrolling owners to not be considered a bank holding company |  |  |  |  |  |  | 4.99% |  |  |
Maximum ownership percentage |  |  |  |  |  |  |  |  |  | 9.99%
Shares exchanged | 934 | 86,620 | 522,564 | 550,000 |  |  |  |  |  |
Stock outstanding |  |  |  |  |  |  |  | 462,354 |  |
Tcw Shared Opportunity Fund | Class B Common Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Stock outstanding |  |  |  |  |  |  |  | 0 |  |
Common Stock | Class A Common Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of shares of voting common stock |  |  |  |  |  |  |  | 3,251,036 |  |
Subsequent Event | Common Stock | Class A Common Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of shares of voting common stock |  |  |  |  |  | 70,690 |  |  |  |
Subsequent Event | Common Stock | Class B Common Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance of shares of voting common stock |  |  |  |  |  | 70,690 |  |  |  |

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