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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due after one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

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No definition available.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Summary of significant accounting policies (Effect of Topic 606) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018
Balance Sheet
Deferred income taxes	$ 68,368	$ 58,334			$ 75,854
Accrued payroll and other liabilities - current	86,379	94,166			119,427
Accrued payroll and other liabilities - non-current	23,497	35,322		$ 18,918	34,378
Retained earnings	471,149	413,074			397,338
Income Statement
Revenues	2,959,077	3,081,571	$ 3,319,525
Income tax expense	(38,837)	(48,136)	(53,314)
Revenues from franchised restaurants
Income Statement
Revenues	$ 146,790	148,962	157,269
Balances Without Adoption of ASC
Balance Sheet
Deferred income taxes		56,522
Accrued payroll and other liabilities - current		93,770
Accrued payroll and other liabilities - non-current		29,495
Retained earnings		417,485
Income Statement
Income tax expense		(48,393)
Balances Without Adoption of ASC \| Revenues from franchised restaurants
Income Statement
Revenues		149,834
Previously Reported
Balance Sheet
Deferred income taxes			74,299
Accrued payroll and other liabilities - current			119,088
Accrued payroll and other liabilities - non-current		35,322	29,366
Retained earnings			401,134
Accounting Standards Update 2014-09 \| Effect of Change
Balance Sheet
Deferred income taxes		1,812
Accrued payroll and other liabilities - current		396
Accrued payroll and other liabilities - non-current		5,827
Retained earnings		(4,411)
Income Statement
Income tax expense		257
Accounting Standards Update 2014-09 \| Effect of Change \| Revenues from franchised restaurants
Income Statement
Revenues		$ (872)
Accounting Standards Update 2014-09 \| Restatement Adjustment
Balance Sheet
Deferred income taxes			1,555		$ 1,555
Accrued payroll and other liabilities - current			339
Accrued payroll and other liabilities - non-current			5,012
Retained earnings			$ (3,796)