CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents ($67,034 and $7,045 related to VIEs. See Note 11)	$ 143,235	$ 135,823
Short-term investments	19,304
Customer retention deposits	926	481
Accounts receivable, net	356,851	388,000
Costs and estimated earnings in excess of billings	177,662	138,618
Inventory and uninstalled contract materials	39,617	49,201
Prepaid expenses and other current assets	14,529	19,258
Total current assets	752,124	731,381
Property and equipment, net	305,046	277,346
Intangible assets, net	48,655	32,841
Goodwill	151,118	127,226
Other long-term assets	4,749	2,004
Total assets	1,261,692	1,170,798
Current liabilities:
Accounts payable	153,677	168,110
Billings in excess of costs and estimated earnings	159,120	112,606
Accrued expenses and other current liabilities	125,626	108,006
Dividends payable	2,829	2,839
Current portion of capital leases	214	188
Current portion of long-term debt	62,697	58,189
Current portion of contingent earnout liabilities	1,252
Total current liabilities	505,415	449,938
Long-term capital leases, net of current portion	245	15
Long-term debt, net of current portion	191,948	203,381
Deferred tax liabilities	9,830	9,830
Other long-term liabilities	13,007	9,064
Total liabilities	720,445	672,228
Commitments and contingencies
Stockholders' equity
Common stock—$.0001 par value; 90,000,000 shares authorized; 51,448,753 and 51,576,442 issued and outstanding at September 30, 2017 and December 31, 2016	5	5
Additional paid-in capital	160,277	162,128
Retained earnings	376,537	335,218
Noncontrolling interests	4,428	1,219
Total stockholders' equity	541,247	498,570
Total liabilities and stockholders' equity	$ 1,261,692	$ 1,170,798