CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents ($48,094 and $7,045 related to VIEs. See Note 11)	$ 111,676	$ 135,823
Customer retention deposits	906	481
Accounts receivable, net	355,231	388,000
Costs and estimated earnings in excess of billings	158,741	138,618
Inventory and uninstalled contract materials	42,318	49,201
Prepaid expenses and other current assets	16,082	19,258
Total current assets	684,954	731,381
Property and equipment, net	309,013	277,346
Intangible assets, net	51,228	32,841
Goodwill	150,672	127,226
Other long-term assets	1,624	2,004
Total assets	1,197,491	1,170,798
Current liabilities:
Accounts payable	134,091	168,110
Billings in excess of costs and estimated earnings	158,698	112,606
Accrued expenses and other current liabilities	116,244	108,006
Dividends payable	2,829	2,839
Current portion of capital leases	186	188
Current portion of long-term debt	58,031	58,189
Current portion of contingent earnout liabilities	1,213
Total current liabilities	471,292	449,938
Long-term capital leases, net of current portion	170	15
Long-term debt, net of current portion	183,140	203,381
Deferred tax liabilities	9,830	9,830
Other long-term liabilities	11,623	9,064
Total liabilities	676,055	672,228
Commitments and contingencies
Stockholders' equity
Common stock—$.0001 par value; 90,000,000 shares authorized; 51,437,305 and 51,576,442 issued and outstanding at June 30, 2017 and December 31, 2016	5	5
Additional paid-in capital	159,761	162,128
Retained earnings	358,779	335,218
Noncontrolling interests	2,891	1,219
Total stockholders' equity	521,436	498,570
Total liabilities and stockholders' equity	$ 1,197,491	$ 1,170,798