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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	17. SUBSEQUENT EVENTS On April 3, 2018, the Company declared a quarterly dividend of $1.00 per common share. The dividend was paid on April 26, 2018 to shareholders of record on April 13, 2018. The total dividend paid amounted to $46.5 million.