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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 21,339 | $ 20,704
Adjustments to reconcile net income to net cash flows provided by operating activities: |  |
Depreciation and amortization | 51,255 | 53,606
Provision for doubtful accounts | 5,110 | 6,325
Amortization of debt discount and debt issuance costs | 631 | 1,747
Stock-based compensation | 2,071 | 1,908
Deferred income taxes |  | 108
Equity in earnings of an unconsolidated affiliate | (976) | (2,331)
Gain on disposition of long-lived assets | (1,076) |
Changes in operating assets and liabilities: |  |
Accounts receivable | (7,169) | (10,225)
Materials and supplies, prepayments, and other current assets | (9,124) | (3,401)
Income tax receivable |  | 11,545
Accounts payable and accrued liabilities, advance payments and deposits and other current liabilities | (1,271) | (5,054)
Accrued taxes | (24,723) | 9,156
Other | (632) | (4,480)
Net cash provided by operating activities | 35,435 | 79,608
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (52,183) | (32,272)
Proceeds from disposition of long-lived assets | 1,500 |
Net cash used in investing activities | (50,683) | (32,272)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from borrowing under term loan |  | 275,000
Proceeds from borrowings under revolver loan |  | 46,378
Principal repayments of term loan | (3,920) | (252,953)
Principal repayments of revolver loan |  | (74,534)
Proceeds from stock option exercises | 1,232 | 946
Dividends paid on common stock | (3,919) | (7,119)
Distributions to non-controlling interests | (2,562) | (929)
Payments of debt issuance costs | (12) | (3,564)
Repurchase of non-controlling interests |  | (80)
Investments made by non-controlling interests | 135 | 805
Purchase of common stock | (915) | (184)
Net cash provided by (used in) financing activities | (9,961) | (16,234)
NET CHANGE IN CASH AND CASH EQUIVALENTS | (25,209) | 31,102
CASH AND CASH EQUIVALENTS, beginning of the period | 136,647 | 48,735
CASH AND CASH EQUIVALENTS, end of the period | $ 111,438 | $ 79,837

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- Definition Cash outflow in the form of ordinary dividends to common shareholders, generally out of earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -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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