CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 1,005,898	$ 1,024,008
Receivables - trade and other	470,299	423,839
Prepaid expenses and other current assets	66,789	55,121
Deferred tax assets - net	20,387	26,628
Assets of discontinued operations	23,559	22,954
Total current assets	1,586,932	1,552,550
PROPERTY, PLANT AND EQUIPMENT:
Drilling equipment	6,849,769	6,764,046
Construction in progress	889,841	756,308
Other property and equipment	148,255	140,739
Property, plant and equipment - gross	7,887,865	7,661,093
Less accumulated depreciation and amortization	1,677,712	1,589,364
Property, plant and equipment - net	6,210,153	6,071,729
Other assets	67,708	75,208
TOTAL ASSETS	7,864,793	7,699,487
CURRENT LIABILITIES:
Accounts payable - trade	77,627	83,004
Deferred revenues	55,084	52,340
Accrued pension and other postretirement benefits	17,821	23,392
Accrued compensation and related employee costs	38,209	43,732
Accrued income taxes	5,831	26,088
Accrued interest	27,368	27,711
Other current liabilities	11,593	16,572
Liabilities of discontinued operations	21,255	21,255
Total current liabilities	254,788	294,094
Long-term debt	2,009,152	2,009,598
Other liabilities	401,945	390,199
Deferred income taxes - net	495,401	473,872
Commitments and contingent liabilities (Note 4)	0	0
SHAREHOLDERS' EQUITY:
Class A Ordinary Shares, $0.125 par value, 124,778,407 and 124,740,407 shares issued at June 30, 2013, and December 31, 2012, respectively	15,597	15,593
Additional paid-in capital	1,389,598	1,372,135
Retained earnings	3,517,942	3,366,964
Cost of 566,139 and 529,387 treasury shares at June 30, 2013, and December 31, 2012, respectively	(5,833)	(1,886)
Accumulated other comprehensive loss	(213,797)	(221,082)
Total shareholders' equity	4,703,507	4,531,724
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 7,864,793	$ 7,699,487