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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities |  |  |  |
Net (loss) income | $ (59,463) | $ 1,501 | $ 77,366 | $ 24,214
Adjustments to reconcile net income to net cash (used in) provided by operating activities: |  |  |  |
Depreciation and amortization | 35,417 | 35,752 | 71,492 | 69,891
Amortization of debt issue costs and premium and accretion of discount | 2,369 | 2,427 | 5,091 | 7,995
Write-off of debt issue costs, premium and discount accounted as loss on extinguishment | 16,555 |  |  |
Provision for doubtful accounts and sundry losses | 826 | 1,173 | 1,645 | 1,005
Deferred tax benefit | (6,251) | (5,212) | (66,568) | (22,083)
Share-based compensation | 5,483 | 557 | 1,204 | 884
Realized loss on derivative |  |  |  | 1,399
Unrealized (gain) loss of indemnification assets | (19) | 216 | (966) | 292
Amortization of a contract liability |  | (703) | (703) | (7,440)
Loss on disposition of property and equipment | 32 | 47 | 1,671 | 122
Earnings from equity method investment | (625) | (575) | (564) | (833)
Dividend received from equity investee | 500 | 728 | 1,630 | 1,467
Prepayment penalty related to debt refinancing |  |  |  | (3,387)
Premium on issuance of long-term debt |  | 2,000 | 2,000 |
(Increase) decrease in assets: |  |  |  |
Accounts receivable, net | 492 | 4,247 | (15,966) | 3,703
Prepaid expenses and other assets | (5,417) | 993 | 2,257 | (7,409)
Other long-term assets | (323) |  | (3,567) |
Increase (decrease) in liabilities: |  |  |  |
Accounts payable and accrued liabilities | (3,347) | 260 | 6,800 | (1,977)
Income tax payable | (1,867) | (1,292) | (424) | 944
Unearned income | 1,736 | (124) | 266 | 584
Total adjustments | 45,561 | 40,494 | 5,298 | 45,157
Net cash (used in) provided by operating activities | (13,902) | 41,995 | 82,664 | 69,371
Cash flows from investing activities |  |  |  |
Decrease (increase) in restricted cash | (44) | (233) | 349 | 812
Intangible assets acquired | (7,927) | (3,712) | (10,896) | (14,466)
Property and equipment acquired | (4,384) | (5,166) | (16,613) | (8,963)
Proceeds from sales of property and equipment | 11 | 43 | 118 | 114
Acquisition of an equity method investment |  |  |  | (9,244)
Net cash used in investing activities | (12,344) | (9,068) | (27,042) | (31,747)
Cash flows from financing activities |  |  |  |
Proceeds from issuance of long-term debt |  |  | 208,725 |
Proceeds from initial public offering, net of offering costs of $12,567 | 112,369 |  |  |
Proceeds from issuance of debt | 700,000 | 208,725 |  |
Statutory minimum withholding taxes paid on cashless exercises of stock options | (16,688) |  |  |
Debt issuance costs | (12,077) | (2,174) | (2,174) |
Short-term borrowings |  |  | 26,995 |
Repayment of short-term borrowings | (18,332) |  |  |
Dividends paid |  | (269,772) | (319,959) |
Tax windfall benefits on exercises of stock options | 470 |  |  |
Issuance of common stock | 91 | 250 | 450 | 2,641
Repayment and repurchase of long-term debt | (745,522) |  |  | (38,590)
Repayment of other financing agreement | (112) |  | (225) | (674)
Net cash (used in) provided by financing activities | 20,199 | (62,971) | (86,188) | (36,623)
Net (decrease) increase in cash | (6,047) | (30,044) | (30,566) | 1,001
Cash at beginning of the period | 25,634 | 56,200 | 56,200 | 55,199
Cash at end of the period | 19,587 | 26,156 | 25,634 | 56,200
Supplemental disclosure of cash flow information: |  |  |  |
Cash paid for interest |  |  | 46,107 | 43,860
Cash paid for income taxes |  |  | 2,837 | 1,638
Supplemental disclosure of non-cash activities: |  |  |  |
Dividend declared not received from equity method investment | 500 | 1,457 |  |
Liability related to unvested portion of stock options as a result of equitable adjustment (Note 14) |  |  | $ 3,151 |

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- Definition Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) of investing activities, excluding discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e565-108580 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with other investments held by the entity for investment purposes not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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