Organization and Significant Accounting Policies - Assets or Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 25, 2015	Dec. 26, 2014
Interest Rate Swap [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	$ 23
Other liabilities:
Assets or liabilities measured at fair value	23
Interest Rate Swap [Member] | Significant Other Observable Inputs (Level 2) [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	23
Other liabilities:
Assets or liabilities measured at fair value	23
Money Market Fund Deposits [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	640	$ 14,396
Other liabilities:
Assets or liabilities measured at fair value	640	14,396
Money Market Fund Deposits [Member] | Level 1 [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	640	14,396
Other liabilities:
Assets or liabilities measured at fair value	640	$ 14,396
Contingent Earn-out Liability [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	831
Other liabilities:
Assets or liabilities measured at fair value	831
Contingent Earn-out Liability [Member] | Significant Unobservable Inputs (Level 3) [Member]
Cash and cash equivalents:
Assets or liabilities measured at fair value	831
Other liabilities:
Assets or liabilities measured at fair value	$ 831