CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,719	$ 5,343
Accounts receivable, net of allowances of $537 and $605, respectively	256,364	283,008
Costs and estimated earnings in excess of billings on uncompleted contracts	93,206	78,260
Current portion of receivable for insurance claims in excess of deductibles	4,366	4,221
Refundable income taxes, net	0	391
Other current assets	7,882	8,513
Total current assets	363,537	379,736
Property and equipment, net of accumulated depreciation of $238,112 and $231,391, respectively	151,570	148,084
Goodwill	46,988	46,994
Intangible assets, net of accumulated amortization of $5,305 and $5,183, respectively	10,720	10,852
Receivable for insurance claims in excess of deductibles	14,440	14,295
Investment in joint ventures	719	168
Other assets	3,617	3,659
Total assets	591,591	603,788
Current liabilities:
Current portion of capital lease obligations	1,094	1,086
Accounts payable	105,042	110,383
Billings in excess of costs and estimated earnings on uncompleted contracts	18,699	28,919
Current portion of accrued self-insurance	12,452	13,138
Income taxes payable, net	2,110	0
Other current liabilities	42,562	35,038
Total current liabilities	181,959	188,564
Deferred income tax liabilities	13,525	13,452
Long-term debt	67,381	78,960
Accrued self-insurance	32,046	32,225
Capital lease obligations, net of current maturities	2,349	2,629
Other liabilities	903	919
Total liabilities	298,163	316,749
Commitments and contingencies
Stockholders’ equity:
Preferred stock—$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at March 31, 2018 and December 31, 2017	0	0
Common stock—$0.01 par value per share; 100,000,000 authorized shares; 16,492,060 and 16,464,757 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	164	163
Additional paid-in capital	144,260	143,934
Accumulated other comprehensive loss	(316)	(299)
Retained earnings	149,320	143,241
Total stockholders’ equity	293,428	287,039
Total liabilities and stockholders’ equity	$ 591,591	$ 603,788

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.