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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current assets: |  |
Cash and cash equivalents ($60,256 and $7,045 related to VIEs. See Note 12) | $ 170,385 | $ 135,823
Customer retention deposits | 1,000 | 481
Accounts receivable, net | 358,175 | 388,000
Costs and estimated earnings in excess of billings | 160,092 | 138,618
Inventory and uninstalled contract materials | 40,922 | 49,201
Prepaid expenses and other current assets | 12,640 | 18,985
Total current assets | 743,214 | 731,108
Property and equipment, net | 311,777 | 277,346
Intangible assets, net | 44,800 | 32,841
Goodwill | 153,374 | 127,226
Other long-term assets | 2,575 | 2,046
Total assets | 1,255,740 | 1,170,567
Current liabilities: |  |
Accounts payable | 140,943 | 168,110
Billings in excess of costs and estimated earnings | 159,034 | 112,606
Accrued expenses and other current liabilities | 111,387 | 108,006
Dividends payable | 3,087 | 2,839
Current portion of capital leases | 132 | 188
Current portion of long-term debt | 65,464 | 58,189
Current portion of contingent earnout liabilities | 716 |
Total current liabilities | 480,763 | 449,938
Long-term capital leases, net of current portion | 196 | 15
Long-term debt, net of current portion | 193,351 | 203,150
Deferred tax liabilities | 13,571 | 9,830
Other long-term liabilities | 5,676 | 9,064
Total liabilities | 693,557 | 671,997
Commitments and contingencies (See Note 13) |  |
Stockholders' equity |  |
Common stock—$.0001 par value; 90,000,000 shares authorized; 51,448,753 and 51,576,442 issued and outstanding at December 31, 2017 and December 31, 2016 | 5 | 5
Additional paid-in capital | 160,502 | 162,128
Retained earnings | 395,961 | 335,218
Noncontrolling interest | 5,715 | 1,219
Total stockholders' equity | 562,183 | 498,570
Total liabilities and stockholders' equity | $ 1,255,740 | $ 1,170,567

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(22)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(24)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(7)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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