ORGANIZATION - Common Stock Issued (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | 12 Months Ended | 127 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Jan. 31, 2013 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Dec. 31, 2012 |
Nov. 07, 2014 |
Nov. 06, 2014 |
Feb. 14, 2014 |
Feb. 13, 2014 |
May. 16, 2013 |
May. 15, 2013 |
|
| Class of Stock [Line Items] | |||||||||||
| Net Proceeds (millions) | $ 197.9 | $ 1,262.6 | |||||||||
| Issuance of common stock, shares | 9,583,333 | 230,090 | 7,848,926 | 29,821,308 | 28,754,274 | ||||||
| Shares Issued, Price Per Share | $ 56.10 | $ 25.92 | |||||||||
| Common stock, shares issued | 66,654,598 | 66,424,508 | |||||||||
| Share Price (in dollars per share) | $ 4.08 | $ 4.00 | $ 23.53 | $ 29.88 | $ 34.50 | $ 34.74 | $ 73.98 | ||||
| Lower Range | |||||||||||
| Class of Stock [Line Items] | |||||||||||
| Shares Issued, Price Per Share | $ 29.82 | ||||||||||
| Upper Range | |||||||||||
| Class of Stock [Line Items] | |||||||||||
| Shares Issued, Price Per Share | $ 62.88 | ||||||||||
| X | ||||||||||
- Definition The net cash flow associated with the amount received from entity's issuances of common stock. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
|
| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
|
| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|