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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend On February 4, 2019, the Board of Directors declared a quarterly cash dividend of $0.48 per share of common stock, which was paid on February 22, 2019 to shareholders of record as of the close of business on February 15, 2019.