Basis Of Presentation - Adoption for Topic 606 Revenue Recognition (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 07, 2019	Jul. 08, 2018	Jul. 07, 2019	Jul. 08, 2018	Apr. 14, 2019	Sep. 30, 2018	Apr. 15, 2018	Oct. 01, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		$ 222,359	$ 187,983	$ 728,872	$ 692,218
Selling, General and Administrative Expense		24,389	19,671	66,057	80,326
Total operating costs and expenses, net		174,098	111,220	575,164	494,841
Earnings from operations		48,261	76,763	153,708	197,377
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		11,425	65,467	85,423	161,901
Income tax (benefit) expense	[1]	(2,048)	17,334	15,699	75,898
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		13,473	48,133	69,724	86,003
Net earnings		13,189	45,307	72,376	105,102
Prepaid expenses		17,484		17,484			$ 14,443
Total current assets		105,997		105,997			94,973
Deferred tax assets		72,903		72,903			62,140
Other Assets, Noncurrent		215,234		215,234			199,266
Assets, Noncurrent		335,335		335,335			308,755
Assets		831,270		831,270			823,397
Accrued Liabilities, Current		124,823		124,823			106,922
Liabilities, Current		218,849		218,849			183,720
Other long-term liabilities		221,219		221,219			193,449
Liabilities, Noncurrent		1,192,982		1,192,982			1,231,376
Retained Earnings (Accumulated Deficit)		1,565,287		1,565,287			1,561,353
Stockholders' Equity Attributable to Parent		(580,561)	(490,470)	(580,561)	(490,470)	$ (592,514)	(591,699)	$ (430,910)	$ (388,130)
Liabilities and Equity		831,270		831,270			$ 823,397
Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		40,180	38,787	130,840	124,387
Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		40,386	0	131,189	0
Franchise [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Franchise advertising and other services expenses		41,882	$ 0	136,397	$ 0
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		181,055		594,700
Franchise advertising and other services expenses		0		0
Selling, General and Administrative Expense		25,885		71,265
Total operating costs and expenses, net		133,712		443,975
Earnings from operations		47,343		150,725
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		10,507		82,440
Income tax (benefit) expense		(2,285)		14,930
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		12,792		67,510
Net earnings		12,508		70,162
Prepaid expenses		18,253		18,253
Total current assets		106,766		106,766
Deferred tax assets		59,945		59,945
Other Assets, Noncurrent		215,503		215,503
Assets, Noncurrent		322,646		322,646
Assets		819,350		819,350
Accrued Liabilities, Current		119,855		119,855
Liabilities, Current		213,881		213,881
Other long-term liabilities		179,152		179,152
Liabilities, Noncurrent		1,150,915		1,150,915
Retained Earnings (Accumulated Deficit)		1,600,401		1,600,401
Stockholders' Equity Attributable to Parent		(545,447)		(545,447)
Liabilities and Equity		819,349		819,349
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		39,262		127,857
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(918)		(2,983)
Franchise advertising and other services expenses		0		0
Selling, General and Administrative Expense		0		0
Total operating costs and expenses, net		0		0
Earnings from operations		(918)		(2,983)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(918)		(2,983)
Income tax (benefit) expense		(237)		(769)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(681)		(2,214)
Net earnings		(681)		(2,214)
Prepaid expenses		769		769
Total current assets		769		769
Deferred tax assets		(12,958)		(12,958)
Other Assets, Noncurrent		269		269
Assets, Noncurrent		(12,689)		(12,689)
Assets		(11,920)		(11,920)
Contract with Customer, Liability, Current		(4,968)		(4,968)
Liabilities, Current		(4,968)		(4,968)
Other long-term liabilities		(42,067)		(42,067)
Liabilities, Noncurrent		(42,067)		(42,067)
Retained Earnings (Accumulated Deficit)		35,114		35,114
Stockholders' Equity Attributable to Parent		35,114		35,114
Liabilities and Equity		(11,921)		(11,921)
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(918)		(2,983)
Franchise Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(38,133)		(124,187)
Franchise advertising and other services expenses		(38,133)		(124,187)
Selling, General and Administrative Expense		0		0
Total operating costs and expenses, net		(38,133)		(124,187)
Earnings from operations		0		0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		0		0
Income tax (benefit) expense		0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		0		0
Net earnings		0		0
Prepaid expenses		0		0
Total current assets		0		0
Deferred tax assets		0		0
Other Assets, Noncurrent		0		0
Assets, Noncurrent		0		0
Assets		0		0
Accrued Liabilities, Current		0		0
Liabilities, Current		0		0
Other long-term liabilities		0		0
Liabilities, Noncurrent		0		0
Retained Earnings (Accumulated Deficit)		0		0
Stockholders' Equity Attributable to Parent		0		0
Liabilities and Equity		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Marketing And Sourcing Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(38,133)		(124,187)
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		(2,253)		(7,002)
Franchise advertising and other services expenses		(3,749)		(12,210)
Selling, General and Administrative Expense		1,496		5,208
Total operating costs and expenses, net		(2,253)		(7,002)
Earnings from operations		0		0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		0		0
Income tax (benefit) expense		0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		0		0
Net earnings		0		0
Prepaid expenses		0		0
Total current assets		0		0
Deferred tax assets		0		0
Other Assets, Noncurrent		0		0
Assets, Noncurrent		0		0
Assets		0		0
Accrued Liabilities, Current		0		0
Liabilities, Current		0		0
Other long-term liabilities		0		0
Liabilities, Noncurrent		0		0
Retained Earnings (Accumulated Deficit)		0		0
Stockholders' Equity Attributable to Parent		0		0
Liabilities and Equity		0		0
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Royalty and Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		0		0
Technology And Support Fees [Member] | Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Franchise contributions for advertising and other services [Domain]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues		$ (2,253)		$ (7,002)

[1] Percentages may not add due to rounding.