v3.3.1.900

Subsequent events (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 23, 2016 | Feb. 29, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Feb. 22, 2016 | Nov. 21, 2014
Subsequent events |  |  |  |  |  |  |
Additional borrowings |  |  | $ 20,000 | $ 3,500 | $ 0 |  |
Revolving Line of Credit |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 46,500
Performance-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Vesting percentage upon completion of continuous service |  |  | 33.00% |  |  |  |
Subsequent Event | Revolving Line of Credit |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Additional borrowings |  | $ 5,000 |  |  |  |  |
Increase in borrowing capacity | $ 23,250 |  |  |  |  |  |
Maximum borrowing capacity | $ 69,750 |  |  |  |  | $ 46,500 |
Subsequent Event | Certain Executives | Time-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Granted (in shares) |  | 975,000 |  |  |  |  |
Subsequent Event | Certain Executives | Performance-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Granted (in shares) |  | 975,000 |  |  |  |  |
Subsequent Event | Other executive officers | Time-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Granted (in shares) |  | 192,000 |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |
Subsequent Event | Other executive officers | Performance-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Granted (in shares) |  | 192,000 |  |  |  |  |
Vesting percentage upon completion of continuous service |  | 8.33% |  |  |  |  |
Subsequent Event | Other executive officers | Performance-based restricted stock unit awards | Before March 15, 2018 |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Vesting percentage |  | 66.67% |  |  |  |  |
Subsequent Event | Other executive officers | Performance-based restricted stock unit awards | On May 1, 2018 |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Vesting percentage |  | 8.33% |  |  |  |  |
Subsequent Event | Non-executive personnel | Time-based restricted stock unit awards |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Granted (in shares) |  | 539,000 |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |

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