Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 609,469	$ 627,964	$ 1,895,301	$ 1,970,087
Cost of sales, including warehousing, distribution and occupancy	412,663	412,556	1,272,801	1,280,136
Gross profit	196,806	215,408	622,500	689,951
Selling, general, and administrative	150,961	148,392	465,575	430,448
Gains on refranchising	(230)	(383)	(384)	(18,283)
Long-lived asset impairments (Note 4)	3,861	3,045	23,217	3,045
Other loss (income), net (Note 4)	1,769	(539)	274	(441)
Operating income	40,445	64,893	133,818	275,182
Interest expense, net (Note 5)	16,339	15,360	48,300	45,078
Income before income taxes	24,106	49,533	85,518	230,104
Income tax expense (Note 11)	2,643	17,179	24,544	82,907
Net income	$ 21,463	$ 32,354	$ 60,974	$ 147,197
Earnings per share (Note 8):
Basic (in dollars per share)	$ 0.31	$ 0.47	$ 0.89	$ 2.11
Diluted (in dollars per share)	$ 0.31	$ 0.47	$ 0.89	$ 2.10
Weighted average common shares outstanding (Note 8):
Basic (in shares)	68,354	68,190	68,296	69,808
Diluted (in shares)	68,569	68,315	68,411	69,939
Dividends declared per share (in dollars per share)	$ 0	$ 0.20	$ 0	$ 0.6