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CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
ASSETS |  |
Cash and Cash Equivalents | $ 263,737 | $ 4,471
Accounts Receivable: |  |
Oil and gas sales | 39,057 | 35,734
Joint interest operations | 23,045 | 5,608
Marketable Securities |  | 12,312
Assets of Discontinued Operations |  | 7,568
Derivative Financial Instruments | 3,524 | 11,651
Other Current Assets | 5,143 | 5,310
Total current assets | 334,506 | 82,654
Property and Equipment: |  |
Unevaluated oil and gas properties | 74,612 | 112,851
Oil and gas properties, successful efforts method | 3,517,588 | 3,373,695
Other | 18,440 | 18,628
Accumulated depreciation, depletion and amortization | (1,700,831) | (1,546,487)
Net property and equipment | 1,909,809 | 1,958,687
Assets of Discontinued Operations |  | 511,366
Other Assets | 17,907 | 19,944
Total Assets | 2,262,222 | 2,572,651
LIABILITIES AND STOCKHOLDERS’ EQUITY |  |
Accounts Payable | 82,679 | 70,552
Deferred Income Taxes | 1,233 | 5,340
Accrued Liabilities | 38,214 | 37,001
Liabilities of Discontinued Operations |  | 33,280
Total current liabilities | 122,126 | 146,173
Long-term Debt | 883,324 | 1,324,383
Deferred Income Taxes | 209,529 | 149,901
Reserve for Future Abandonment Costs | 16,660 | 16,387
Other Non-Current Liabilities | 2,202 | 2,273
Total liabilities | 1,233,841 | 1,639,117
Commitments and Contingencies |  |
Stockholders’ Equity: |  |
Common stock – $0.50 par, 75,000,000 shares authorized, 48,315,612 and 48,408,734 shares outstanding at June 30, 2013 and December 31, 2012, respectively | 24,158 | 24,204
Additional paid-in capital | 483,386 | 480,595
Retained earnings | 520,837 | 424,317
Accumulated other comprehensive income |  | 4,418
Total stockholders’ equity | 1,028,381 | 933,534
Total liabilities and stockholders' equity | $ 2,262,222 | $ 2,572,651

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