CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 5,343	$ 23,846
Accounts receivable, net of allowances of $605 and $432, respectively	283,008	234,642
Costs and estimated earnings in excess of billings on uncompleted contracts	78,260	69,950
Current portion of receivable for insurance claims in excess of deductibles	4,221	3,785
Refundable income taxes	391	2,474
Other current assets	8,513	8,202
Total current assets	379,736	342,899
Property and equipment, net of accumulated depreciation of $231,391 and $209,466, respectively	148,084	154,891
Goodwill	46,994	46,781
Intangible assets, net of accumulated amortization of $5,183 and $4,684, respectively	10,852	11,566
Receivable for insurance claims in excess of deductibles	14,295	14,692
Investment in joint venture	168	0
Other assets	3,659	2,666
Total assets	603,788	573,495
Current liabilities
Current portion of capital lease obligations	1,086	1,085
Accounts payable	110,383	99,942
Billings in excess of costs and estimated earnings on uncompleted contracts	28,919	42,321
Current portion of self insurance reserves	13,138	10,492
Other current liabilities	35,038	42,382
Total current liabilities	188,564	196,222
Deferred income tax liabilities	13,452	18,565
Long-term debt	78,960	59,070
Self insurance reserves	32,225	32,092
Capital lease obligations, net of current maturities	2,629	3,833
Other liabilities	919	539
Total liabilities	316,749	310,321
Commitments and contingencies
Stockholders’ equity
Preferred stock - $0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at December 31, 2017 and December 31, 2016	0	0
Common stock - $0.01 par value per share; 100,000,000 authorized shares; 16,464,757 and 16,333,139 shares issued and outstanding at December 31, 2017 and December 31, 2016, respectively	163	162
Additional paid-in capital	143,934	140,100
Accumulated other comprehensive income (loss)	(299)	(433)
Retained earnings	143,241	123,345
Total stockholders' equity	287,039	263,174
Total liabilities and stockholders' equity	$ 603,788	$ 573,495

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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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.