XML 72 R38.htm IDEA: XBRL DOCUMENT
v2.4.0.8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) | 12 Months Ended
--- | ---
Dec. 27, 2013 | Dec. 28, 2012 | Dec. 30, 2011
Costs of contract revenue |  |  |
Payroll taxes, bonuses and employee benefit costs for all Company personnel | $ 20,555,000 | $ 22,421,000 | $ 22,594,000
Facilities costs | 4,654,000 | 4,871,000 | 4,875,000
Cost of Sales |  |  |
Costs of contract revenue |  |  |
Payroll taxes, bonuses and employee benefit costs for all Company personnel | 0 |  |
Facilities costs | $ 0 |  |

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of expenditures for salaries and wages (excluding the portion of technical and nontechnical salaries and wages incurred in connection with revenue producing projects) and payroll taxes, bonuses and employee benefit costs for all company personnel, excluding equity-based compensation. + References No definition available. + Details
Name: | wldn_LaborAndRelatedExpenseExcludingStockBasedCompensation
Namespace Prefix: | wldn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | wldn_ReceivablesLongTermContractsOrProgramsLineItems
Namespace Prefix: | wldn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration