PREFERRED STOCK (Details) - USD ($)
$ / shares in Units, $ in Millions |
12 Months Ended |
|
|
Dec. 31, 2016 |
Dec. 31, 2014 |
Dec. 31, 2011 |
Dec. 31, 2010 |
Dec. 31, 2009 |
May 24, 2016 |
Dec. 31, 2015 |
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Conversion of stock |
|
1,807,369
|
|
|
|
|
|
| Additional shares issued |
15,483,499
|
138,239
|
|
|
|
|
11,797,404
|
| Accrued dividend |
$ 0.4
|
|
|
|
|
|
|
| IPO |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Additional shares issued |
|
|
|
|
|
3,044,252
|
|
| Series C preferred stock | IPO |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Issue of preferred stock (value) |
|
|
|
|
$ 23.6
|
|
|
| Dividend rate |
|
|
|
|
9.00%
|
|
|
| Conversion of stock |
|
|
|
|
2,360
|
|
|
| Conversion of Stock, Shares Converted |
|
|
|
|
2,008,543
|
|
|
| Series D preferred stock |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Issue of preferred stock |
|
3,377
|
|
|
|
|
|
| Series D preferred stock | IPO |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Issue of preferred stock (value) |
|
|
|
$ 23.8
|
|
|
|
| Issue of preferred stock |
|
|
|
2,377
|
|
|
|
| Dividend rate |
|
|
|
9.00%
|
|
|
|
| Number of shares held by offer accepted shareholders |
|
|
|
130
|
|
|
|
| Repurchase amount |
|
|
|
$ 1.3
|
|
|
|
| Redemption amount ( in dollars per share) |
|
|
|
$ 10,000
|
|
|
|
| Series E preferred stock |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Issue of preferred stock (value) |
|
|
$ 6.3
|
|
|
|
|
| Issue of preferred stock |
|
3,377
|
|
|
|
|
|
| Dividend rate |
|
|
9.00%
|
|
|
|
|
| Series F preferred stock |
|
|
|
|
|
|
|
| Class of Stock [Line Items] |
|
|
|
|
|
|
|
| Issue of preferred stock (value) |
|
|
$ 5.0
|
|
|
|
|
| Issue of preferred stock |
|
3,377
|
|
|
|
|
|
| Dividend rate |
|
|
9.00%
|
|
|
|
|