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Shareholders' Equity - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Apr. 25, 2016
Class of Stock [Line Items] |  |  |
Net proceeds from issuance of common stock | $ 38,773 | $ 0 |
ATM [Member] |  |  |
Class of Stock [Line Items] |  |  |
Maximum value of common stock to be issued |  |  | $ 50,000
Value of common stock issued | 40,500 |  |
Net proceeds from issuance of common stock | 38,800 |  |
Payments for commissions | $ 1,000 |  |
ATM [Member] | Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Shares issued | 5,081,339 |  |
Price per share issued | $ 7.98 |  |

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