Borrowings - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 28, 2018	Jul. 25, 2018	Jun. 29, 2018	Jun. 04, 2018	Jul. 24, 2017	May 22, 2014
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity	$ 200,000,000
Cash, cash equivalents and marketable securities at financial institutions located in the United States	40,000,000
Deposits or securities	10,000,000
Minimum net worth required for credit agreement	$ 200,000,000
Percentage of quarterly net income required for credit agreement	50.00%
Minimum debt service coverage ratio	150.00%
Maximum senior leverage ratio	250.00%
Minimum quick ratio required for credit agreement	110.00%
Interest expense from remaining unamortized debt issuance costs	$ 100,000
Derivative, maturity date	2023-06
Net loss on interest rate swap agreement	$ (33,000)
After Fifth Amendment
Line of Credit Facility [Line Items]
Cash, cash equivalents and marketable securities at financial institutions located in the United States	40,000,000
Deposits or securities	20,000,000
Minimum net worth required for credit agreement	$ 338,000,000
Percentage of quarterly net income required for credit agreement	50.00%
Minimum debt service coverage ratio	150.00%
Maximum senior leverage ratio	250.00%
Minimum quick ratio required for credit agreement	110.00%
LIBOR
Line of Credit Facility [Line Items]
Credit line interest rate	LIBOR rate plus a spread of 1.75% to 2.50%
LIBOR | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate	LIBOR rate plus a spread of 1.50% to 2.25%
LIBOR | Minimum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	1.75%
LIBOR | Minimum | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	1.50%
LIBOR | Maximum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	2.50%
LIBOR | Maximum | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	2.25%
Base Rate
Line of Credit Facility [Line Items]
Credit line interest rate	Base rate, determined in accordance with the Facility Agreement, plus a spread of 0.75% to 1.50%
Base Rate | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate	Base rate plus a spread of 0.50% to 1.25%
Base Rate | Minimum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	0.75%
Base Rate | Minimum | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	0.50%
Base Rate | Maximum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	1.50%
Base Rate | Maximum | After Fifth Amendment
Line of Credit Facility [Line Items]
Credit line interest rate, percentage	1.25%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity	$ 150,000,000			$ 25,000,000		$ 150,000,000
Line of credit facility increase in borrowing capacity	$ 100,000,000
Line of credit facility extended termination date	Jun. 04, 2023
Line of credit facility termination date	May 22, 2019
Line of credit facility, additional commitments				200,000,000
Term Loan Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity	$ 50,000,000
Line of credit facility amount outstanding	$ 63,400,000		$ 64,200,000	$ 65,000,000
Derivative, fixed interest rate		2.86%			1.55%
Derivative, maturity date	2019-05