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Summary of Significant Accounting Policies and Estimates (Tables) | 12 Months Ended
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Dec. 31, 2025
Accounting Policies [Abstract] |
Schedule of cash paid | Cash paid (in thousands) for:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2024 | ​ ​ ​ | 2023
Interest | ​ | $ | 7,903 | ​ | $ | 6,428 | ​ | $ | 9,862
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income taxes, net of refunds | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ | $ | 204,077 | ​ | $ | 73,000 | ​ | $ | 83,000
State | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​
Arizona | ​ | ​ | * | ​ | ​ | 5,536 | ​ | ​ | *
Remaining states | ​ | ​ | 49,472 | ​ | ​ | 24,283 | ​ | ​ | 17,254
Subtotal | ​ | ​ | 49,472 | ​ | ​ | 29,819 | ​ | ​ | 17,254
Total income taxes, net of refunds | ​ | $ | 253,549 | ​ | $ | 102,819 | ​ | $ | 100,254
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
* Jurisdiction below the threshold for the period presented.
Schedule of activity in allowance for credit losses | Activity in our allowance for credit losses consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31, 2025 | ​ | Year Ended December 31, 2024
​ | Service | ​ | Construction | ​ | Other | ​ | Total | ​ | Service | ​ | Construction | ​ | Other | ​ | Total
Balance at beginning of year | $ | 7,617 | ​ | $ | 9,860 | ​ | $ | 108 | ​ | $ | 17,585 | ​ | $ | 5,700 | ​ | $ | 7,600 | ​ | $ | 77 | ​ | $ | 13,377
Bad debt expense | ​ | 3,061 | ​ | ​ | 3,481 | ​ | ​ | 67 | ​ | ​ | 6,609 | ​ | ​ | 4,190 | ​ | ​ | 2,731 | ​ | ​ | 31 | ​ | ​ | 6,952
Deductions for uncollectible receivables written off, net of recoveries | ​ | (1,883) | ​ | ​ | (515) | ​ | ​ | — | ​ | ​ | (2,398) | ​ | ​ | (2,273) | ​ | ​ | (596) | ​ | ​ | — | ​ | ​ | (2,869)
Credit allowance of acquired receivables on the acquisition date | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 125 | ​ | ​ | — | ​ | ​ | 125
Balance at end of period | $ | 8,795 | ​ | $ | 12,826 | ​ | $ | 175 | ​ | $ | 21,796 | ​ | $ | 7,617 | ​ | $ | 9,860 | ​ | $ | 108 | ​ | $ | 17,585

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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