CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 249,886	$ 233,401
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	249,886	233,401
Accounts receivable	885,917	800,619
Unbilled accounts receivable	382,780	366,168
Inventories	829,276	742,634
Other current assets	117,955	122,291
Total current assets	2,465,814	2,265,113
Property, plant and equipment	1,027,944	1,026,046
Accumulated depreciation	(454,543)	(452,074)
Property, plant and equipment, net	573,401	573,972
Other Assets
Goodwill	2,528,819	2,460,103
Other intangibles, net	1,231,727	1,204,432
Other noncurrent assets	76,020	76,360
Total other assets	3,836,566	3,740,895
Total Assets	6,875,781	6,579,980
Current Liabilities
Accounts payable	608,316	552,525
Customer deposits	378,158	369,716
Accrued compensation	170,511	164,210
Accrued warranty	140,620	137,542
Current portion of long-term debt	49,557	47,225
Other accrued liabilities	300,886	302,112
Total current liabilities	1,648,048	1,573,330
Long-term debt	1,871,076	1,823,303
Accrued postretirement and pension benefits	105,556	103,734
Deferred income taxes	182,780	175,902
Accrued warranty	16,951	15,521
Other long-term liabilities	63,141	59,658
Total Liabilities	3,887,552	3,751,448
Commitments and contingencies (Note 15)
Equity
Preferred stock, 1,000,000 shares authorized, no shares issued	0	0
Common stock, $0.01 par value; 200,000,000 shares authorized: 132,349,534 shares issued and 96,227,365 and 96,034,352 outstanding at March 31, 2018 and December 31, 2017, respectively	1,323	1,323
Additional paid-in capital	907,801	906,616
Treasury stock, at cost, 36,122,169 and 36,315,182 shares, at March 31, 2018 and December 31, 2017, respectively	(824,157)	(827,379)
Retained earnings	2,850,135	2,773,300
Accumulated other comprehensive income (loss)	34,016	(44,992)
Total Westinghouse Air Brake Technologies Corporation shareholders' equity	2,969,118	2,808,868
Noncontrolling interest	19,111	19,664
Total Equity	2,988,229	2,828,532
Total Liabilities and Equity	$ 6,875,781	$ 6,579,980

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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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.