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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On April 27, 2017, the company announced a first quarter 2017 dividend of 29.0 cents per share, payable on June 2, 2017, to shareholders of record at the close of business on May 12, 2017 with an ex-dividend date of May 10, 2017. On April 27, 2017, the company also announced that it has entered into a definitive agreement to acquire Source, an independent specialist provider of exchange-traded funds (ETFs) based in Europe.