Supplemental Consolidating Financial Statements - Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jan. 24, 2015	Jul. 26, 2014	Jan. 25, 2014	Jul. 27, 2013
Current assets:
Cash and equivalents	$ 18,428	$ 20,672	$ 16,344	$ 18,607
Accounts receivable, net	267,286us-gaap_AccountsReceivableNetCurrent	272,741us-gaap_AccountsReceivableNetCurrent
Costs and estimated earnings in excess of billings	212,314	230,569
Inventories	43,768us-gaap_InventoryNet	49,095us-gaap_InventoryNet
Deferred tax assets, net	18,732us-gaap_DeferredTaxAssetsNetCurrent	19,932us-gaap_DeferredTaxAssetsNetCurrent
Other current assets	23,837us-gaap_OtherAssetsCurrent	12,727us-gaap_OtherAssetsCurrent
Total current assets	584,365us-gaap_AssetsCurrent	605,736us-gaap_AssetsCurrent
Property and equipment, net	207,148us-gaap_PropertyPlantAndEquipmentNet	205,413us-gaap_PropertyPlantAndEquipmentNet
Goodwill	269,465us-gaap_Goodwill	269,088us-gaap_Goodwill
Intangible assets, net	114,173	116,116
Deferred tax assets, net non-current	0us-gaap_DeferredTaxAssetsNetNoncurrent	0us-gaap_DeferredTaxAssetsNetNoncurrent
Investment in subsidiaries	0dy_InvestmentInWhollyOwnedSubsidiaries	0dy_InvestmentInWhollyOwnedSubsidiaries
Intercompany receivables	0dy_IntercompanyReceivablesAggregate
Other	18,382us-gaap_OtherAssetsNoncurrent	16,001us-gaap_OtherAssetsNoncurrent
Total non-current assets	609,168us-gaap_AssetsNoncurrent	606,618us-gaap_AssetsNoncurrent
Total assets	1,193,533us-gaap_Assets	1,212,354us-gaap_Assets
Current liabilities:
Accounts payable	52,114us-gaap_AccountsPayableCurrent	63,318us-gaap_AccountsPayableCurrent
Current portion of debt	12,500us-gaap_DebtCurrent	10,938us-gaap_DebtCurrent
Billings in excess of costs and estimated earnings	16,422	13,882
Accrued insurance claims	34,185dy_AccruedInsuranceClaimsCurrent	32,260dy_AccruedInsuranceClaimsCurrent
Accrued insurance claims	0us-gaap_DeferredTaxLiabilitiesCurrent	0us-gaap_DeferredTaxLiabilitiesCurrent
Other accrued liabilities	62,991us-gaap_OtherAccruedLiabilitiesCurrent	76,134us-gaap_OtherAccruedLiabilitiesCurrent
Total current liabilities	178,212us-gaap_LiabilitiesCurrent	196,532us-gaap_LiabilitiesCurrent
Long-term debt	421,418	446,863
Accrued insurance claims	38,348dy_AccruedInsuranceClaimsNoncurrent	33,782dy_AccruedInsuranceClaimsNoncurrent
Deferred tax liabilities, net non-current	45,596	45,361
Intercompany payables	0dy_IntercompanyPayablesAggregate	0dy_IntercompanyPayablesAggregate
Other liabilities	5,051us-gaap_OtherLiabilitiesNoncurrent	4,882us-gaap_OtherLiabilitiesNoncurrent
Total liabilities	688,625us-gaap_Liabilities	727,420us-gaap_Liabilities
Total stockholders' equity	504,908us-gaap_StockholdersEquity	484,934us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	1,193,533	1,212,354
Parent
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Costs and estimated earnings in excess of billings	0	0
Inventories	0	0
Deferred tax assets, net	3,602	3,822
Other current assets	17,012	4,956
Total current assets	20,614	8,778
Property and equipment, net	18,678	18,108
Goodwill	0	0
Intangible assets, net	0	0
Deferred tax assets, net non-current	705	182
Investment in subsidiaries	839,856	809,617
Intercompany receivables	0	0
Other	10,625	7,748
Total non-current assets	869,864	835,655
Total assets	890,478	844,433
Current liabilities:
Accounts payable	977	3,083
Current portion of debt	12,500	10,938
Billings in excess of costs and estimated earnings	0	0
Accrued insurance claims	162	612
Accrued insurance claims	0	0
Other accrued liabilities	8,203	12,668
Total current liabilities	21,842	27,301
Long-term debt	140,875	166,125
Accrued insurance claims	86	778
Deferred tax liabilities, net non-current	0	0
Intercompany payables	219,607	162,127
Other liabilities	3,160	3,168
Total liabilities	385,570	359,499
Total stockholders' equity	504,908	484,934
Total liabilities and stockholders' equity	890,478	844,433
Issuer
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Costs and estimated earnings in excess of billings	0	0
Inventories	0	0
Deferred tax assets, net	0	0
Other current assets	42	16
Total current assets	42	16
Property and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Deferred tax assets, net non-current	0	0
Investment in subsidiaries	1,595,469	1,540,338
Intercompany receivables	0	0
Other	5,295	5,636
Total non-current assets	1,600,764	1,545,974
Total assets	1,600,806	1,545,990
Current liabilities:
Accounts payable	0	0
Current portion of debt	0	0
Billings in excess of costs and estimated earnings	0	0
Accrued insurance claims	0	0
Accrued insurance claims	80	80
Other accrued liabilities	532	566
Total current liabilities	612	646
Long-term debt	280,543	280,738
Accrued insurance claims	0	0
Deferred tax liabilities, net non-current	432	432
Intercompany payables	479,363	454,557
Other liabilities	0	0
Total liabilities	760,950	736,373
Total stockholders' equity	839,856	809,617
Total liabilities and stockholders' equity	1,600,806	1,545,990
Subsidiary Guarantors
Current assets:
Cash and equivalents	17,080	19,739	15,212	18,166
Accounts receivable, net	265,297	269,760
Costs and estimated earnings in excess of billings	210,921	228,541
Inventories	43,768	49,095
Deferred tax assets, net	15,228	16,193
Other current assets	6,503	7,237
Total current assets	558,797	590,565
Property and equipment, net	170,150	171,158
Goodwill	269,465	269,088
Intangible assets, net	113,596	115,483
Deferred tax assets, net non-current	3,618	3,884
Investment in subsidiaries	1,566	1,621
Intercompany receivables	708,222	628,443
Other	2,315	2,466
Total non-current assets	1,268,932	1,192,143
Total assets	1,827,729	1,782,708
Current liabilities:
Accounts payable	49,926	58,970
Current portion of debt	0	0
Billings in excess of costs and estimated earnings	16,422	13,882
Accrued insurance claims	33,973	31,599
Accrued insurance claims	36	66
Other accrued liabilities	52,752	61,284
Total current liabilities	153,109	165,801
Long-term debt	0	0
Accrued insurance claims	38,215	32,959
Deferred tax liabilities, net non-current	48,312	48,593
Intercompany payables	0	0
Other liabilities	1,887	1,711
Total liabilities	241,523	249,064
Total stockholders' equity	1,586,206	1,533,644
Total liabilities and stockholders' equity	1,827,729	1,782,708
Non- Guarantor Subsidiaries
Current assets:
Cash and equivalents	1,348	933	1,132	441
Accounts receivable, net	1,989	2,981
Costs and estimated earnings in excess of billings	1,393	2,028
Inventories	0	0
Deferred tax assets, net	71	87
Other current assets	280	518
Total current assets	5,081	6,547
Property and equipment, net	18,320	16,147
Goodwill	0	0
Intangible assets, net	577	633
Deferred tax assets, net non-current	0	15
Investment in subsidiaries	0	0
Intercompany receivables	0	0
Other	147	151
Total non-current assets	19,044	16,946
Total assets	24,125	23,493
Current liabilities:
Accounts payable	1,211	1,265
Current portion of debt	0	0
Billings in excess of costs and estimated earnings	0	0
Accrued insurance claims	50	49
Accrued insurance claims	53	24
Other accrued liabilities	1,504	1,616
Total current liabilities	2,818	2,954
Long-term debt	0	0
Accrued insurance claims	47	45
Deferred tax liabilities, net non-current	1,175	417
Intercompany payables	9,252	11,759
Other liabilities	4	3
Total liabilities	13,296	15,178
Total stockholders' equity	10,829	8,315
Total liabilities and stockholders' equity	24,125	23,493
Eliminations and Reclassifications
Current assets:
Cash and equivalents	0	0	0	0
Accounts receivable, net	0	0
Costs and estimated earnings in excess of billings	0	0
Inventories	0	0
Deferred tax assets, net	(169)	(170)
Other current assets	0	0
Total current assets	(169)	(170)
Property and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Deferred tax assets, net non-current	(4,323)	(4,081)
Investment in subsidiaries	(2,436,891)	(2,351,576)
Intercompany receivables	(708,222)	(628,443)
Other	0	0
Total non-current assets	(3,149,436)	(2,984,100)
Total assets	(3,149,605)	(2,984,270)
Current liabilities:
Accounts payable	0	0
Current portion of debt	0	0
Billings in excess of costs and estimated earnings	0	0
Accrued insurance claims	0	0
Accrued insurance claims	(169)	(170)
Other accrued liabilities	0	0
Total current liabilities	(169)	(170)
Long-term debt	0	0
Accrued insurance claims	0	0
Deferred tax liabilities, net non-current	(4,323)	(4,081)
Intercompany payables	(708,222)	(628,443)
Other liabilities	0	0
Total liabilities	(712,714)	(632,694)
Total stockholders' equity	(2,436,891)	(2,351,576)
Total liabilities and stockholders' equity	$ (3,149,605)	$ (2,984,270)

Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

No definition available.