Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 462,516	$ 450,193
Accounts receivable, net of allowances for doubtful accounts	429,752	489,749
Inventory	297,645	280,130
Other current assets	56,817	42,523
Total Current Assets	1,246,730	1,262,595
Property and Equipment, at cost	2,711,998	2,728,125
Less accumulated depreciation	1,588,567	1,574,867
Net Property and Equipment	1,123,431	1,153,258
Other Assets:
Goodwill	445,512	443,551
Other non-current assets	275,323	270,911
Total Other Assets	720,835	714,462
Total Assets	3,090,996	3,130,315
Current Liabilities:
Accounts payable	86,895	77,593
Accrued liabilities	390,633	430,771
Total Current Liabilities	477,528	508,364
Long-term Debt	793,908	793,058
Other Long-term Liabilities	330,427	312,250
Commitments and Contingencies
Stockholders' Equity:
Common Stock	27,709	27,709
Additional paid-in capital	218,307	227,566
Treasury stock, at cost	(720,119)	(731,202)
Retained earnings	2,272,961	2,295,234
Accumulated other comprehensive income	(309,725)	(302,664)
Total Shareholders' Equity	1,489,133	1,516,643
Total Liabilities and Sharesholders' Equity	$ 3,090,996	$ 3,130,315