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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current assets |  |  |  |
Cash and cash equivalents | $ 1,308,733 |  | $ 309,766 |
Accounts receivable, net | 389,399 |  | 445,506 |
Derivative contracts | 25,693 |  | 71,022 |
Costs in excess of billings | 6,735 |  | 11,229 |
Prepaid expenses | 40,159 |  | 31,319 |
Restricted deposit | 0 |  | 255,000 |
Other current assets | 18,439 |  | 19,043 |
Total current assets | 1,789,158 |  | 1,142,885 |
Oil and natural gas properties, using full cost method of accounting |  |  |  |
Proved | 9,975,304 | [1] | 12,262,921 | [1]
Unproved | 548,923 |  | 865,863 |
Less: accumulated depreciation, depletion and impairment | (5,384,132) |  | (5,231,182) |
Net oil and natural gas properties capitalized costs | 5,140,095 |  | 7,897,602 |
Other property, plant and equipment, net | 595,511 |  | 582,375 |
Derivative contracts | 25,219 |  | 23,617 |
Other assets | 128,328 |  | 144,252 |
Total assets | 7,678,311 |  | 9,790,731 |
Current liabilities |  |  |  |
Accounts payable and accrued expenses | 672,372 |  | 766,544 |
Billings and estimated contract loss in excess of costs incurred | 5,798 |  | 15,546 |
Derivative contracts | 12,970 |  | 14,860 |
Asset retirement obligations | 91,113 |  | 118,504 |
Deposit on pending sale | 0 |  | 255,000 |
Total current liabilities | 782,253 |  | 1,170,454 |
Long-term debt | 3,194,543 |  | 4,301,083 |
Derivative contracts | 40,384 |  | 59,787 |
Asset retirement obligations | 367,456 |  | 379,906 |
Other long-term obligations | 18,183 |  | 17,046 |
Total liabilities | 4,402,819 |  | 5,928,276 |
Commitments and contingencies (Note 11) |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Common stock, $0.001 par value, 800,000 shares authorized; 494,605 issued and 493,327 outstanding at March 31, 2013 and 491,578 issued and 490,359 outstanding at December 31, 2012 | 479 |  | 476 |
Additional paid-in capital | 5,242,821 |  | 5,233,019 |
Additional paid-in capital - stockholder receivable | (5,000) |  | (5,000) |
Treasury stock, at cost | (8,974) |  | (8,602) |
Accumulated deficit | (3,344,269) |  | (2,851,048) |
Total SandRidge Energy, Inc. stockholders' equity | 1,885,065 |  | 2,368,853 |
Noncontrolling interest | 1,390,427 |  | 1,493,602 |
Total equity | 3,275,492 |  | 3,862,455 |
Total liabilities and equity | 7,678,311 |  | 9,790,731 |
8.5% Convertible perpetual preferred stock |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | 3 |  | 3 |
6.0% Convertible perpetual preferred stock |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | 2 |  | 2 |
7.0% Convertible perpetual preferred stock |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | $ 3 |  | $ 3 |
[1] | Includes cumulative capitalized interest of $14.7 million and $11.7 million at March 31, 2013 and December 31, 2012, respectively.

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