Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 91,532	$ 112,183
Accounts receivable, net of allowances of $5,066 and $2,752	1,980,245	1,500,115
Costs and estimated earnings in excess of billings on uncompleted contracts	642,776	473,308
Inventories	86,391	88,548
Prepaid expenses and other current assets	147,295	114,591
Total current assets	2,948,239	2,288,745
Property and equipment, net of accumulated depreciation of $966,387 and $862,825	1,256,458	1,174,094
Other assets, net	223,486	101,028
Other intangible assets, net of accumulated amortization of $324,879 and $297,313	275,018	187,023
Goodwill	1,937,045	1,603,169
Total assets	6,640,246	5,354,059
Current Liabilities:
Current maturities of long-term debt and short-term debt	2,804	7,563
Accounts payable and accrued expenses	1,214,745	922,819
Billings in excess of costs and estimated earnings on uncompleted contracts	374,943	274,846
Total current liabilities	1,592,492	1,205,228
Long-term debt and notes payable, net of current maturities	760,208	353,562
Deferred income taxes	211,983	192,834
Insurance and other non-current liabilities	345,332	259,733
Total liabilities	2,910,015	2,011,357
Commitments and Contingencies
Equity:
Common stock, value	2	1
Additional paid-in capital	1,878,040	1,749,306
Retained earnings	2,077,498	1,876,081
Accumulated other comprehensive loss	(192,187)	(271,673)
Treasury stock, 483,592 and 0 common shares	(35,823)	(14,288)
Total stockholders’ equity	3,727,530	3,339,427
Non-controlling interests	2,701	3,275
Total equity	3,730,231	3,342,702
Total liabilities and equity	6,640,246	5,354,059
Exchangeable Shares
Equity:
Common stock, value	0	0
Series F Preferred Stock
Equity:
Preferred Stock, value	0	0
Series G Preferred Stock
Equity:
Preferred Stock, value	$ 0	$ 0

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- 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.