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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Current assets:      
Cash and cash equivalents $ 74,242 $ 162,772 $ 118,702
Receivables, net 743,274 646,251 641,389
Inventories 315,767 274,205 269,569
Deferred income taxes 25,345 40,407 14,713
Commodity derivative instruments 19,193 27,687 38,794
Prepayments and other current assets 71,579 43,316 48,851
Total current assets 1,249,400 1,194,638 1,132,018
Investments 102,139 109,424 109,249
Property, plant and equipment 8,129,872 7,646,222 7,506,833
Less accumulated depreciation, depletion and amortization 3,546,927 3,361,208 3,307,433
Net property, plant and equipment 4,582,945 4,285,014 4,199,400
Deferred charges and other assets: [Abstract]      
Goodwill 636,039 [1] 634,931 [1] 634,931 [1]
Other intangible assets, net 18,015 20,843 22,248
Other 314,133 311,275 262,107
Total deferred charges and other assets 968,187 967,049 919,286
Total assets 6,902,671 6,556,125 6,359,953
Current liabilities:      
Short-term borrowings 11,000 0 0
Long-term debt due within one year 240,564 139,267 76,600
Accounts payable 402,241 337,228 305,695
Taxes payable 54,903 70,176 77,190
Dividends payable 31,800 31,794 30,850
Accrued compensation 48,792 47,804 44,100
Commodity derivative instruments 2,072 13,164 3,028
Other accrued liabilities 233,773 259,320 226,986
Total current liabilities 1,025,145 898,753 764,449
Long-term debt 1,502,413 1,285,411 1,347,014
Deferred credits and other liabilities:      
Deferred income taxes 797,249 769,166 746,946
Other liabilities 834,934 827,228 710,465
Total deferred credits and other liabilities 1,632,183 1,596,394 1,457,411
Stockholders' equity:      
Preferred stocks 15,000 15,000 15,000
Common stockholders' equity:      
Shares issued - 189,369,450 at September 30, 2012, 189,332,485 at September 30, 2011 and 189,332,485 at December 31, 2011 189,369 189,332 189,332
Other paid-in capital 1,038,066 1,035,739 1,034,411
Retained earnings 1,550,569 1,586,123 1,556,550
Accumulated other comprehensive income (loss), net of tax (46,448) (47,001) (588)
Treasury stock at cost - 538,921 shares (3,626) (3,626) (3,626)
Total common stockholders' equity 2,727,930 2,760,567 2,776,079
Total stockholders' equity 2,742,930 2,775,567 2,791,079
Total liabilities and stockholders' equity $ 6,902,671 $ 6,556,125 $ 6,359,953
[1] Balance is presented net of accumulated impairment of $12.3 million at the pipeline and energy services segment, which occurred in prior periods.