Line of Credit - Additional Information (Details)			12 Months Ended
	Mar. 29, 2018 USD ($)	Jan. 04, 2016 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Line Of Credit Facility [Line Items]
Minimum fixed charge coverage ratio			3.00
Line of credit			$ 11,000,000	$ 37,000,000
Remaining borrowing capacity			$ 289,000,000	$ 263,000,000
Line of credit facility, interest rate at period end			4.00%	3.10%
Interest expense			$ 2,055,000	$ 1,812,000	$ 1,899,000
Debt, weighted average interest rate			3.70%	2.80%	2.40%
Additional costs related to the Credit Agreement				$ 1,105,000
Unamortized debt issuance cost written off in connection with amending Original Credit Agreement				536,000
Amortization of debt issuance costs			$ 710,000	1,610,000	$ 1,076,000
Other Assets
Line Of Credit Facility [Line Items]
Debt issuance costs			$ 2,834,000	$ 3,549,000
Maximum | Fiscal Quarter Ending on or Prior to September 30, 2016
Line Of Credit Facility [Line Items]
Leverage ratio			3.00
Revolving Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 300,000,000	$ 250,000,000	$ 400,000,000
Credit agreement maturity date	Mar. 29, 2018	Jan. 04, 2016	Mar. 29, 2023
Additional borrowing capacity	$ 100,000,000
Debt instrument, basis spread on variable rate			0.00%
Revolving Credit Facility | Minimum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			0.50%
Line of credit facility, unused capacity, commitment fee percentage			0.25%
Revolving Credit Facility | Maximum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1.50%
Line of credit facility, unused capacity, commitment fee percentage			0.45%
Revolving Credit Facility | Federal Funds Effective Rate
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			0.50%
Revolving Credit Facility | London Interbank Offered Rate ("LIBOR")
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1.00%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Line Of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			2.50%
Letter of Credit
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		$ 10,000,000
Swing-Line Loans
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		$ 10,000,000