Shareholders' Equity - Schedule of Stockholders Equity (Details) - USD ($) $ in Thousands		3 Months Ended
	Jun. 24, 2018	Sep. 30, 2018	Sep. 24, 2017
Stockholders Equity [Line Items]
Balance at June 24, 2018		$ 389,781	$ 360,806
Balance (in shares) at June 24, 2018		18,352,824
Options exercised		$ 244	219
Stock-based compensation		872	965
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions		(133)
Other comprehensive income, net of tax		(2,922)	3,174
Net income		1,812	8,960
Balance at September 30, 2018	$ 389,781	$ 390,113	374,124
Balance (in shares) at September 30, 2018	18,352,824	18,379,523
ASU No. 2014-09 [Member]
Stockholders Equity [Line Items]
Adoption of the New Revenue Recognition Guidance	$ 459	$ 459
Common Stock [Member]
Stockholders Equity [Line Items]
Balance at June 24, 2018		$ 1,835	$ 1,823
Balance (in shares) at June 24, 2018		18,353,000	18,230,000
Options exercised		$ 2	$ 3
Options exercised (in shares)		16,000	31,000
Conversion of restricted stock units		$ 1
Conversion of restricted stock units (in shares)		14,000
Stock-based compensation (in shares)		1,000
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions, (in shares)		(4,000)
Balance at September 30, 2018	$ 1,835	$ 1,838	$ 1,826
Balance (in shares) at September 30, 2018	18,353,000	18,380,000	18,261,000
Capital in Excess of Par Value [Member]
Stockholders Equity [Line Items]
Balance at June 24, 2018		$ 56,726	$ 51,923
Options exercised		242	216
Conversion of restricted stock units		(1)
Stock-based compensation		872	965
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions		(133)
Balance at September 30, 2018	$ 56,726	57,706	53,104
Retained Earnings [Member]
Stockholders Equity [Line Items]
Balance at June 24, 2018		371,753	339,940
Net income		1,812	8,960
Balance at September 30, 2018	371,753	374,024	348,900
Retained Earnings [Member] | ASU No. 2014-09 [Member]
Stockholders Equity [Line Items]
Adoption of the New Revenue Recognition Guidance		459
Accumulated Other Comprehensive Loss [Member]
Stockholders Equity [Line Items]
Balance at June 24, 2018		(40,533)	(32,880)
Other comprehensive income, net of tax		(2,922)	3,174
Balance at September 30, 2018	$ (40,533)	$ (43,455)	$ (29,706)