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Stock-Based Compensation	6 Months Ended
Stock-Based Compensation	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	7. Stock-Based Compensation Stock Plans During the three and six months ended June 30, 2018, the Company granted 0 and 1,125,000 shares of restricted stock, respectively. As of June 30, 2018, there were 2.8 million shares available for future grants under the 2015 Omnibus Equity Incentive Plan.