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COMMITMENTS AND CONTINGENCIES - Future minimum lease payments (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
|
|---|---|
| Commitments and Contingencies Disclosure [Abstract] | |
| 2014 | $ 2,766 |
| 2015 | 2,750 |
| 2016 | 2,706 |
| 2017 | 2,703 |
| 2018 | 2,099 |
| Thereafter | 36,755 |
| Operating leases, future minimum payments due | $ 49,779 |