Accounts Receivable (Tables)

6 Months Ended

Jul. 27, 2019

Accounts, Notes, Loans and Financing Receivable [Line Items]

Schedule of Accounts Receivable

The Company maintains an allowance for doubtful accounts for estimated losses on uncollected balances. Approximately $16.8 million of the allowance for doubtful accounts as of January 26, 2019 was classified as non-current. The allowance for doubtful accounts changed as follows (dollars in thousands):

	For the Three Months Ended						For the Six Months Ended
	July 27, 2019			July 28, 2018			July 27, 2019			July 28, 2018
Allowance for doubtful accounts at beginning of period	$	1,372		$	976		$	17,702		$	998
Provision for bad debt (recovery)	(202		)	(14		)	(10,514		)	(38		)
Amounts (charged) recovered against the allowance	(246		)	(14		)	(6,264		)	(12		)
Allowance for doubtful accounts at end of period	$	924		$	948		$	924		$	948

Accounts receivable, net classified as current consisted of the following (dollars in thousands):

	July 27, 2019			January 26, 2019
Trade accounts receivable	$	310,934		$	331,903
Unbilled accounts receivable	476,682			283,463
Retainage	10,216			10,831
Total	797,832			626,197
Less: allowance for doubtful accounts	(924		)	(939		)
Accounts receivable, net	$	796,908		$	625,258

Contract with Customer, Asset and Liability

Net contract assets consisted of the following (dollars in thousands):

	July 27, 2019		January 26, 2019
Contract assets	$	357,615	$	215,849
Contract liabilities	13,272		15,125
Contract assets, net	$	344,343	$	200,724

Accounts Receivable Risk

Customers whose combined amounts of accounts receivable and contract assets, net exceeded 10% of total combined accounts receivable and contract assets, net as of July 27, 2019 or January 26, 2019 were as follows (dollars in millions):

	July 27, 2019			January 26, 2019
	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	481.8	42.3%	$	298.4	36.2%
CenturyLink, Inc.	$	171.4	15.0%	$	147.2	17.9%
Comcast Corporation	$	142.9	12.5%	$	127.2	15.4%
AT&T Inc.	$	112.3	9.8%	$	90.6	11.0%

Total contract revenues by customer type during the three and six months ended July 27, 2019 and July 28, 2018 were as follows (dollars in millions):

	For the Three Months Ended						For the Six Months Ended
	July 27, 2019			July 28, 2018			July 27, 2019			July 28, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Telecommunications	$	804.4	91.0%	$	726.7	90.9%	$	1,565.8	91.2%	$	1,393.9	91.1%
Underground facility locating	53.8		6.1	49.0		6.1	102.0		5.9	94.1		6.1
Electrical and gas utilities and other	26.0		2.9	23.8		3.0	50.2		2.9	42.8		2.8
Total contract revenues	$	884.2	100.0%	$	799.5	100.0%	$	1,718.0	100.0%	$	1,530.8	100.0%

Customers whose contract revenues exceeded 10% of total contract revenues during the three or six months ended July 27, 2019 or July 28, 2018, as well as total contract revenues from all other customers combined, were as follows (dollars in millions):

	For the Three Months Ended						For the Six Months Ended
	July 27, 2019			July 28, 2018			July 27, 2019			July 28, 2018
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Verizon Communications Inc.	$	205.0	23.2%	$	147.3	18.4%	$	384.8	22.4%	$	269.5	17.6%
AT&T Inc.	183.3		20.7	165.2		20.7	392.5		22.8	342.2		22.4
CenturyLink, Inc.	138.7		15.7	107.6		13.5	248.5		14.5	197.2		12.9
Comcast Corporation	133.2		15.1	171.2		21.4	270.3		15.7	330.3		21.6
Total other customers combined	224.0		25.3	208.2		26.0	421.9		24.6	391.6		25.5
Total contract revenues	$	884.2	100.0%	$	799.5	100.0%	$	1,718.0	100.0%	$	1,530.8	100.0%