| CONDENSED CONSOLIDATED CASH FLOW STATEMENTS (Parenthetical) $ in Thousands | 6 Months Ended | 
|---|---|
| Jun. 30, 2015  USD ($) | |
| Common stock | |
| Cash flows from financing activities | |
| Stock issuance costs | $ 13,387 | 
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- References No definition available. 
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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