Organization and Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015	Dec. 26, 2015
Liabilities:
Earn-out contingent consideration obligation	$ (1,532)		$ (1,532)		$ (1,875)
Assets:
Non-qualified Deferred Compensation Plan Investments	591		591		564
Income Taxes
Income tax benefit	$ 268	$ 1,169	$ 898	$ 9,393
Effective tax rate (as a percent)	49.10%	37.50%	40.90%	36.20%
Fair Value, Inputs, Level 1 | Other Assets
Assets:
Non-qualified Deferred Compensation Plan Investments	$ 591		$ 591		564
Fair Value, Inputs, Level 3 | Accrued Liabilities
Liabilities:
Earn-out contingent consideration obligation	(263)		(263)		(376)
Fair Value, Inputs, Level 3 | Other Liabilities
Liabilities:
Earn-out contingent consideration obligation	$ (1,269)		$ (1,269)		$ (1,499)