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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events Dividend On July 24, 2018, the Company declared a dividend of $0.17 per share for the quarter ended September 30, 2018, payable on October 2, 2018, to stockholders of record as of September 17, 2018.