COMMON STOCK (Details)
$ / shares in Units, $ in Millions |
12 Months Ended |
|
Dec. 31, 2016
USD ($)
Shareholder
$ / shares
|
Dec. 31, 2015
USD ($)
$ / shares
|
Dec. 31, 2014
USD ($)
$ / shares
|
| Class of Stock [Line Items] |
|
|
|
| Number of days from trigger date to purchase Class B common shares |
|
90 days
|
|
| Percentage of common stock held by shareholder one |
23.15%
|
|
|
| Common stock dividends declared | $ |
$ 3.2
|
$ 3.2
|
$ 3.2
|
| Minimum [Member] |
|
|
|
| Class of Stock [Line Items] |
|
|
|
| Percentage of outstanding common stock held by two shareholders |
|
10.00%
|
|
| Percentage of common stock needs to held by shareholders having more than ten percent of Class A common stock as per class B Protection clause |
|
10.00%
|
|
| Maximum [Member] |
|
|
|
| Class of Stock [Line Items] |
|
|
|
| Percentage shareholding of class B considered as per class B Protection clause |
10.00%
|
|
|
| Class A [Member] |
|
|
|
| Class of Stock [Line Items] |
|
|
|
| Number of shareholders with ownership in excess of ten percent | Shareholder |
1
|
|
|
| Common stock dividends declared each quarter (in dollars per share) |
$ 0.06
|
$ 0.06
|
$ 0.06
|
| Class B [Member] |
|
|
|
| Class of Stock [Line Items] |
|
|
|
| Common stock dividends declared each quarter (in dollars per share) |
$ 0.07
|
$ 0.07
|
$ 0.07
|