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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Current assets |  |  |  |
Cash and cash equivalents | $ 1,094,341 |  | $ 309,766 |
Accounts receivable, net | 412,140 |  | 445,506 |
Derivative contracts | 53,424 |  | 71,022 |
Costs in excess of billings and contract loss | 5,057 |  | 11,229 |
Prepaid expenses | 38,162 |  | 31,319 |
Restricted deposit | 0 |  | 255,000 |
Other current assets | 38,866 |  | 19,043 |
Total current assets | 1,641,990 |  | 1,142,885 |
Oil and natural gas properties, using full cost method of accounting |  |  |  |
Proved | 10,355,137 | [1] | 12,262,921 | [1]
Unproved | 535,836 |  | 865,863 |
Less: accumulated depreciation, depletion and impairment | (5,515,168) |  | (5,231,182) |
Net oil and natural gas properties capitalized costs | 5,375,805 |  | 7,897,602 |
Other property, plant and equipment, net | 567,910 |  | 582,375 |
Derivative contracts | 43,173 |  | 23,617 |
Other assets | 124,758 |  | 144,252 |
Total assets | 7,753,636 |  | 9,790,731 |
Current liabilities |  |  |  |
Accounts payable and accrued expenses | 746,944 |  | 766,544 |
Accounts payable - related party (Note 15) | 55,098 |  | 0 |
Billings and contract loss in excess of costs incurred | 0 |  | 15,546 |
Derivative contracts | 1,798 |  | 14,860 |
Asset retirement obligations | 79,953 |  | 118,504 |
Deposit on pending sale | 0 |  | 255,000 |
Total current liabilities | 883,793 |  | 1,170,454 |
Long-term debt | 3,194,660 |  | 4,301,083 |
Derivative contracts | 11,717 |  | 59,787 |
Asset retirement obligations | 365,397 |  | 379,906 |
Other long-term obligations | 21,771 |  | 17,046 |
Total liabilities | 4,477,338 |  | 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; 490,929 issued and 489,616 outstanding at June 30, 2013 and 491,578 issued and 490,359 outstanding at December 31, 2012 | 483 |  | 476 |
Additional paid-in capital | 5,280,402 |  | 5,233,019 |
Additional paid-in capital - stockholder receivable | (5,000) |  | (5,000) |
Treasury stock, at cost | (9,096) |  | (8,602) |
Accumulated deficit | (3,378,587) |  | (2,851,048) |
Total SandRidge Energy, Inc. stockholders' equity | 1,888,210 |  | 2,368,853 |
Noncontrolling interest | 1,388,088 |  | 1,493,602 |
Total equity | 3,276,298 |  | 3,862,455 |
Total liabilities and equity | 7,753,636 |  | 9,790,731 |
8.5% Convertible perpetual preferred stock; 2,650 shares issued and outstanding at June 30, 2013 and December 31, 2012; aggregate liquidation preference of $265,000 |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | 3 |  | 3 |
6.0% Convertible perpetual preferred stock; 2,000 shares issued and outstanding at June 30, 2013 and December 31, 2012; aggregate liquidation preference of $200,000 |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | 2 |  | 2 |
7.0% Convertible perpetual preferred stock; 3,000 shares issued and outstanding at June 30, 2013 and December 31, 2012; aggregate liquidation preference of $300,000 |  |  |  |
Preferred stock, $0.001 par value, 50,000 shares authorized |  |  |  |
Preferred stock | $ 3 |  | $ 3 |
[1] | Includes cumulative capitalized interest of approximately $17.7 million and $11.7 million at June 30, 2013 and December 31, 2012, respectively.

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- Definition Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 12 -Paragraph 5 -Subparagraph b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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