CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 264,093	$ 254,530
Short-term investments	31,109	20,059
Assets held for sale	76,668	75,678
Accounts receivable, net	508,355	784,671
Inventory, net	103,595	153,824
Other current assets	172,019	187,135
Total current assets	1,155,839	1,475,897
Property, plant and equipment, net	6,267,583	7,027,802
Goodwill	166,917	166,659
Investment in unconsolidated affiliates	893	415,177
Other long-term assets	595,783	452,305
Total assets	8,187,015	9,537,840
Current liabilities:
Current portion of debt	297	6,508
Trade accounts payable	264,578	271,984
Accrued liabilities	543,248	686,613
Income taxes payable	13,811	41,394
Total current liabilities	821,934	1,006,499
Long-term debt	3,578,335	3,655,200
Other long-term liabilities	522,456	552,947
Deferred income taxes	9,495	29,326
Total liabilities	4,932,220	5,243,972
Commitments and contingencies (Note 17)
Shareholders' equity:
Common shares, par value $0.001 per share: Authorized common shares 800,000; issued 333,598 and 330,526, respectively	334	331
Capital in excess of par value	2,521,332	2,493,100
Accumulated other comprehensive income (loss)	(12,119)	(47,593)
Retained earnings	2,033,427	3,131,134
Less: treasury shares, at cost, 49,673 and 49,342 common shares, respectively	(1,295,949)	(1,294,262)
Total shareholders' equity	3,247,025	4,282,710
Noncontrolling interest	7,770	11,158
Total equity	3,254,795	4,293,868
Total liabilities and equity	$ 8,187,015	$ 9,537,840

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.