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Dividends (Notes)	6 Months Ended
	Jun. 30, 2018
Dividends [Abstract]
Dividends Disclosure [Text Block]	Dividends In each of the first two quarters of 2018, the Company’s Board of Directors approved a quarterly dividend of $0.07 per share of common stock, with aggregate dividends of $4.2 million, or $0.14 per common share, paid during the twenty-six weeks ended June 30, 2018. On January 30, 2018, the Company’s Board of Directors declared a special cash dividend of $3.17 per share, which was paid on February 14, 2018, totaling $92.7 million. Subsequent to the second quarter, on August 2, 2018, the Company’s Board of Directors declared a quarterly dividend of $0.09 per share of common stock for stockholders of record as of September 4, 2018, to be paid on September 18, 2018, totaling approximately $2.6 million.

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