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Stockholders' Equity Stockholders Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Apr. 26, 2016
Common Stock, Dividends, Per Share, Cash Paid $ 0.000 $ 0.125 $ 0.000 $ 0.375  
Dividends paid to stockholders     $ 0 $ 19,091  
Beneficial Ownership Percentage Limit 5.00%   5.00%    
2016 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         4,500,000
2013 Stock Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         625,390