CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 148,485	$ 135,823
Customer retention deposits	377	481
Accounts receivable, net	369,775	388,000
Costs and estimated earnings in excess of billings	129,614	138,618
Inventory and uninstalled contract materials	45,130	49,201
Prepaid expenses and other current assets	17,804	19,258
Total current assets	711,185	731,381
Property and equipment, net	285,921	277,346
Intangible assets, net	31,114	32,841
Goodwill	127,226	127,226
Other long-term assets	2,151	2,004
Total assets	1,157,597	1,170,798
Current liabilities:
Accounts payable	124,113	168,110
Billings in excess of costs and estimated earnings	150,771	112,606
Accrued expenses and other current liabilities	105,839	108,006
Dividends payable	2,829	2,839
Current portion of capital leases	107	188
Current portion of long-term debt	58,087	58,189
Total current liabilities	441,746	449,938
Long-term capital leases, net of current portion	14	15
Long-term debt, net of current portion	195,230	203,381
Deferred tax liabilities	9,830	9,830
Other long-term liabilities	9,141	9,064
Total liabilities	655,961	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 March 31, 2017 and December 31, 2016	5	5
Additional paid-in capital	159,518	162,128
Retained earnings	340,073	335,218
Noncontrolling interests	2,040	1,219
Total stockholders' equity	501,636	498,570
Total liabilities and stockholders' equity	$ 1,157,597	$ 1,170,798