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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Operating revenues: |  |  |  |  |  |  |  |
Oil and natural gas | $ 12,116 |  | $ 14,717 |  | $ 24,120 |  | $ 31,502 |
Total operating revenues | 757,276 |  | 659,316 |  | 1,435,444 |  | 1,326,355 |
Operating costs and expenses: |  |  |  |  |  |  |  |
Contract drilling | 255,318 |  | 242,748 |  | 506,377 |  | 489,820 |
Pressure pumping | 241,977 |  | 188,280 |  | 441,785 |  | 356,436 |
Oil and natural gas | 2,872 |  | 3,214 |  | 6,146 |  | 6,136 |
Depreciation, depletion, amortization and impairment | 153,426 |  | 137,182 |  | 300,748 |  | 273,617 |
Selling, general and administrative | 19,548 |  | 18,319 |  | 39,221 |  | 35,716 |
Net gain on asset disposals | (3,091) | [1] | (1,033) | [1] | (4,835) | [1] | (908) | [1]
Total operating costs and expenses | 670,050 |  | 588,710 |  | 1,289,442 |  | 1,160,817 |
Operating income | 87,226 |  | 70,606 |  | 146,002 |  | 165,538 |
Other income (expense): |  |  |  |  |  |  |  |
Interest income | 208 |  | 250 |  | 384 |  | 423 |
Interest expense, net of amount capitalized | (7,249) |  | (6,941) |  | (14,437) |  | (13,707) |
Other | 3 |  | 381 |  | 3 |  | 400 |
Total other expense | (7,038) |  | (6,310) |  | (14,050) |  | (12,884) |
Income before income taxes | 80,188 |  | 64,296 |  | 131,952 |  | 152,654 |
Income tax expense (benefit): |  |  |  |  |  |  |  |
Current | 25,680 |  | 2,335 |  | 52,615 |  | 9,908 |
Deferred | 225 |  | 21,193 |  | (9,768) |  | 45,748 |
Total income tax expense | 25,905 |  | 23,528 |  | 42,847 |  | 55,656 |
Net income | 54,283 |  | 40,768 |  | 89,105 |  | 96,998 |
Net income per common share: |  |  |  |  |  |  |  |
Basic | $ 0.37 |  | $ 0.28 |  | $ 0.62 |  | $ 0.66 |
Diluted | $ 0.37 |  | $ 0.28 |  | $ 0.61 |  | $ 0.66 |
Weighted average number of common shares outstanding: |  |  |  |  |  |  |  |
Basic | 143,622 |  | 145,465 |  | 143,259 |  | 145,148 |
Diluted | 146,029 |  | 146,374 |  | 145,586 |  | 146,292 |
Cash dividends per common share | $ 0.10 |  | $ 0.05 |  | $ 0.20 |  | $ 0.10 |
Contract Drilling |  |  |  |  |  |  |  |
Operating revenues: |  |  |  |  |  |  |  |
Oil and gas services | 438,583 |  | 389,979 |  | 864,486 |  | 809,073 |
Pressure Pumping |  |  |  |  |  |  |  |
Operating revenues: |  |  |  |  |  |  |  |
Oil and gas services | $ 306,577 |  | $ 254,620 |  | $ 546,838 |  | $ 485,780 |
[1] | Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6386349&loc=d3e3636-108311 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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