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Shareholders' Equity	6 Months Ended
Shareholders' Equity	Mar. 31, 2018
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders' Equity On June 6, 2016, the Board of Directors approved a multi-year stock repurchase program under which the Company is authorized to repurchase up to $150.0 million of its common stock (the "2016 Share Repurchase Plan"). During the three months ended March 31, 2018, the Company repurchased 512,943 shares for approximately $31.6 million, at an average price of $61.63 per share. During the six months ended March 31, 2018, the company repurchased 671,409 shares for approximately $41.2 million at an average price of $61.30 per share. During the three months ended April 1, 2017, the Company repurchased 123,082 shares for approximately $6.8 million, at an average price of $55.61 per share. During the six months ended April 1, 2017, the company repurchased 267,811 shares for approximately $13.9 million at an average price of $51.93 per share. All of the purchases under the 2016 Share Repurchase Plan were recorded as treasury stock. On February 14, 2018, the Board of Directors approved a new stock repurchase plan under which the Company is authorized to repurchase $200.0 million of its common stock commencing upon completion of the 2016 Share Repurchase Plan (the "2018 Share Repurchase Plan"). No purchases have yet been made under the 2018 Share Repurchase Plan.