CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 30,471	$ 51,040
Accounts receivable, net of allowances of $1,986 and $2,073, respectively	548,766	472,543
Contract assets, net of allowances of $608 and $499, respectively	410,277	300,615
Current portion of receivable for insurance claims in excess of deductibles	9,359	9,325
Refundable income taxes	4,853	8,944
Prepaid expenses and other current assets	28,557	47,824
Total current assets	1,032,283	890,291
Property and equipment, net of accumulated depreciation of $372,147 and $351,753, respectively	256,295	233,175
Operating lease right-of-use assets	29,098	30,544
Goodwill	115,728	115,847
Intangible assets, net of accumulated amortization of $29,092 and $25,439, respectively	83,790	87,557
Receivable for insurance claims in excess of deductibles	32,618	34,210
Investment in joint ventures	5,405	3,697
Other assets	5,516	3,537
Total assets	1,560,733	1,398,858
Current liabilities:
Current portion of long-term debt	5,265	5,074
Current portion of operating lease obligations	9,319	9,711
Current portion of finance lease obligations	2,139	1,127
Accounts payable	377,690	315,323
Contract liabilities	230,971	227,055
Current portion of accrued self-insurance	28,534	28,752
Accrued income taxes	1,557	0
Other current liabilities	85,176	79,918
Total current liabilities	740,651	666,960
Deferred income tax liabilities	45,737	45,775
Long-term debt	57,073	35,479
Accrued self-insurance	50,384	51,287
Operating lease obligations, net of current maturities	19,776	20,845
Finance lease obligations, net of current maturities	429	2,313
Other liabilities	21,224	15,999
Total liabilities	935,274	838,658
Commitments and contingencies
Shareholders’ equity:
Preferred stock—$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at September 30, 2023 and December 31, 2022	0	0
Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,709,534 and 16,563,767 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	167	165
Additional paid-in capital	160,813	161,427
Accumulated other comprehensive loss	(6,635)	(6,300)
Retained earnings	471,114	404,908
Total shareholders’ equity	625,459	560,200
Total liabilities and shareholders’ equity	$ 1,560,733	$ 1,398,858