Shareholders' Equity - Schedule of Stockholders Equity (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 24, 2018	Dec. 30, 2018	Dec. 24, 2017	Dec. 30, 2018	Dec. 24, 2017
Stockholders Equity [Line Items]
Beginning Balance		$ 390,113	$ 374,124	$ 389,781	$ 360,806
Beginning Balance (in shares)				18,352,824
Options exercised				$ 244	219
Stock-based compensation		1,913	2,114	2,785	3,079
Common stock withheld in satisfaction oftax withholding obligations under net sharesettle transactions				(133)
Other comprehensive income (loss), net of tax		730	(1,751)	(2,192)	1,423
Net income		1,171	11,802	2,983	20,762
Ending Balance	$ 389,781	$ 393,927	386,289	$ 393,927	386,289
Ending Balance (in shares)	18,352,824	18,382,797		18,382,797
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]
Beginning Balance		$ 1,838	$ 1,826	$ 1,835	$ 1,823
Beginning Balance (in shares)		18,380,000	18,261,000	18,353,000	18,230,000
Options exercised			$ 3	$ 2	$ 6
Options exercised (in shares)			23,000	16,000	54,000
Conversion of restricted stock units				$ 1
Conversion of restricted stock units (in shares)		3,000	3,000	17,000	3,000
Stock-based compensation (in shares)			4,000	1,000	4,000
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions, (in shares)				(4,000)
Ending Balance	$ 1,835	$ 1,838	$ 1,829	$ 1,838	$ 1,829
Ending Balance (in shares)	18,353,000	18,383,000	18,291,000	18,383,000	18,291,000
Capital in Excess of Par Value [Member]
Stockholders Equity [Line Items]
Beginning Balance		$ 57,706	$ 53,104	$ 56,726	$ 51,923
Options exercised			(3)	242	213
Conversion of restricted stock units				(1)
Stock-based compensation		1,913	2,114	2,785	3,079
Common stock withheld in satisfaction oftax withholding obligations under net sharesettle transactions				(133)
Ending Balance	$ 56,726	59,619	55,215	59,619	55,215
Retained Earnings [Member]
Stockholders Equity [Line Items]
Beginning Balance		374,024	348,900	371,753	339,940
Net income		1,171	11,802	2,983	20,762
Ending Balance	371,753	375,195	360,702	375,195	360,702
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]
Beginning Balance		(43,455)	(29,706)	(40,533)	(32,880)
Other comprehensive income (loss), net of tax		730	(1,751)	(2,192)	1,423
Ending Balance	$ (40,533)	$ (42,725)	$ (31,457)	$ (42,725)	$ (31,457)