v2.4.0.8
Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
OPERATING ACTIVITIES:    
Net income $ 7,935 $ 7,221
Adjustments to reconcile net income to cash provided by operating activities:    
Depletion, depreciation and amortization 54,951 42,354
Unrealized loss (gain) on commodity derivatives 3,248 (2,582)
Exploration expense 2,010 2,419
Share-based compensation expense 5,389 4,993
Deferred income taxes 4,300 4,119
Equity in income of investee (160)  
Changes in operating assets and liabilities:    
Accounts receivable (2,630) (1,968)
Prepaid expenses and other assets 959 414
Accounts payable 15,300 16,263
Oil, NGL and gas sales payable 491 (319)
Accrued liabilities 27,203 3,550
Cash provided by operating activities 118,996 76,464
INVESTING ACTIVITIES:    
Additions to oil and gas properties (221,514) (224,971)
Contribution to equity method investment (8,279)  
Additions to other property and equipment, net (394) (464)
Cash used in investing activities (230,187) (225,435)
FINANCING ACTIVITIES:    
Proceeds from issuance of common stock, net of offering costs   144,988
Borrowings under senior secured credit facility, net of debt issuance costs 129,059 214,025
Repayment of amounts outstanding under senior secured credit facility (235,950) (210,300)
Proceeds from issuance of senior notes 242,746  
Proceeds from issuance of common stock upon exercise of stock options 58 798
Cash provided by financing activities 135,913 149,511
CHANGE IN CASH AND CASH EQUIVALENTS 24,722 540
CASH AND CASH EQUIVALENTS, beginning of period 767 301
CASH AND CASH EQUIVALENTS, end of period 25,489 841
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash paid for interest $ 3,045 $ 3,341