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Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2020
Revenue From Contract With Customer [Abstract] |
Summary of Disaggregation of Revenue | The Company’s contracts contain both fixed-price and cost reimbursable components. Contract types are based on the component that represents the majority of the contract. The following table presents revenue disaggregated by contract type (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2020 |  |  | June 30, 2019 |  |  | June 30, 2020 |  |  | June 30, 2019 |
Fixed-Price |  | $ | 311,368 |  |  | $ | 304,647 |  |  | $ | 619,676 |  |  | $ | 562,342 |
Time-and-Materials |  |  | 259,381 |  |  |  | 269,364 |  |  |  | 511,820 |  |  |  | 525,070 |
Cost-Plus |  |  | 408,710 |  |  |  | 415,731 |  |  |  | 818,956 |  |  |  | 806,735 |
Total |  | $ | 979,459 |  |  | $ | 989,742 |  |  | $ | 1,950,452 |  |  | $ | 1,894,147 |
Summary of Contract Assets and Contract Liabilities | Contract assets and contract liabilities balances at June 30, 2020 and December 31, 2019 were as follows (in thousands):
|  | June 30, 2020 |  |  | December 31, 2019 |  |  | $ change |  |  | % change |
Contract assets |  | $ | 645,556 |  |  | $ | 575,089 |  |  | $ | 70,467 |  |  |  | 12.3 | %
Contract liabilities |  |  | 219,037 |  |  |  | 230,681 |  |  |  | (11,644 | ) |  |  | -5.0 | %
Net contract assets (liabilities) (1) |  | $ | 426,519 |  |  | $ | 344,408 |  |  | $ | 82,111 |  |  |  | 23.8 | %
(1) | Total contract retentions included in net contract assets (liabilities) were $89.2 million as of June 30, 2020, of which $47.3 million are not expected to be paid in the next 12 months. Total contract retentions included in net contract assets (liabilities) were $85.5 million as of December 31,2019. Contract assets at June 30, 2020 and December 31, 2019 include $103.7 million and $73.0 million, respectively, related to unapproved change orders, claims, and requests for equitable adjustment. For the three and six months ended June 30, 2020 and June 30, 2019, there were no material losses recognized related to the collectability of claims, unapproved change orders, and requests for equitable adjustment.
Summary of Changes in Contract Assets and Contract Liabilities | Certain changes in contract assets and contract liabilities consisted of the following:
|  | June 30, 2020 |  |  | December 31, 2019 |
Acquired contract assets |  | $ | - |  |  | $ | 9,747 |
Acquired contract liabilities |  |  | - |  |  |  | 1,300 |
Change in the estimate of variable consideration |  |  | - |  |  |  | 12,166 |
Summary of Accounts Receivable, Net | Accounts receivable, net consisted of the following as of June 30, 2020 and December 31, 2019 (in thousands):
|  | June 30, 2020 |  |  | December 31, 2019 |
Billed |  | $ | 487,654 |  |  | $ | 475,528 |
Unbilled |  |  | 235,245 |  |  |  | 201,461 |
Total accounts receivable, gross |  |  | 722,899 |  |  |  | 676,989 |
Allowance for doubtful accounts |  |  | (5,541 | ) |  |  | (5,497 | )
Total accounts receivable, net |  | $ | 717,358 |  |  | $ | 671,492 |
Summary of Remaining Unsatisfied Performance Obligations Expect to Satisfy | The Company expects to satisfy its RUPO as of June 30, 2020 over the following periods (in thousands):
Period RUPO Will Be Satisfied |  | Within One Year |  |  | Within One to Two Years |  |  | Thereafter |
Federal Solutions |  | $ | 1,298,368 |  |  | $ | 541,804 |  |  | $ | 259,113 |
Critical Infrastructure |  |  | 1,539,418 |  |  |  | 629,956 |  |  |  | 743,576 |
Total |  | $ | 2,837,786 |  |  | $ | 1,171,760 |  |  | $ | 1,002,689 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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