CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 23,846	$ 39,797
Accounts receivable, net of allowances of $432 and $376, respectively	234,642	187,235
Costs and estimated earnings in excess of billings on uncompleted contracts	69,950	51,486
Receivable for insurance claims in excess of deductibles	18,477	11,290
Refundable income taxes	2,474	5,617
Other current assets	8,202	7,942
Total current assets	357,591	303,367
Property and equipment, net of accumulated depreciation of $209,466 and $181,575, respectively	154,891	160,678
Goodwill	46,781	47,124
Intangible assets, net of accumulated amortization of $4,684 and $3,798, respectively	11,566	11,362
Other assets	2,666	2,394
Total assets	573,495	524,925
Current liabilities
Current portion of capital lease obligations	1,085	0
Accounts payable	99,942	73,300
Billings in excess of costs and estimated earnings on uncompleted contracts	42,321	40,614
Accrued self insurance	42,584	36,967
Other current liabilities	42,382	28,856
Total current liabilities	228,314	179,737
Deferred income tax liabilities	18,565	14,382
Long-term debt	59,070	0
Capital lease obligations, net of current maturities	3,833	0
Other liabilities	539	926
Total liabilities	310,321	195,045
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, 2016 and December 31, 2015	0	0
Common stock - $0.01 par value per share; 100,000,000 authorized shares; 16,333,139 and 19,969,347 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively	162	198
Additional paid-in capital	140,100	161,342
Accumulated other comprehensive income (loss)	(433)	116
Retained earnings	123,345	168,224
Total stockholders’ equity	263,174	329,880
Total liabilities and stockholders’ equity	$ 573,495	$ 524,925

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.