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8. SUPPLEMENTAL GUARANTOR INFORMATION (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | $ (1,366) | $ (152)
Depreciation and amortization | 14,760 | 14,892
Provision for bad debt | 6,822 | 6,484
Equity in earnings of joint ventures | (1,206) | (1,262)
Distributions from joint ventures | 1,921 | 1,575
Deferred rent amortization | 433 | 288
Amortization of deferred financing cost | 457 | 602
Amortization of bond discount | 400 | 234
Loss on sale and disposal of equipment | 170 | 24
Amortization of cash flow hedge |  | 276
Stock-based compensation | 952 | 1,175
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions: |  |
Accounts receivable | (11,782) | (12,023)
Other current assets | (5,099) | (683)
Other assets | (105) | (64)
Deferred revenue | 3 | 86
Accounts payable, accrued expenses and other | 8,861 | 3,979
Net cash provided by operating activities | 15,221 | 15,431
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Purchase of imaging facilities | (3,625) | (580)
Purchase of property and equipment | (12,926) | (13,962)
Proceeds from sale of equipment | 270 | 410
Proceeds from sale of noncontrolling interests | 2,640 |
Proceeds from sale of imaging facilities |  | 2,300
Purchase of equity interest in joint ventures | (724) | (920)
Net cash used in investing activities | (14,365) | (12,752)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Principal payments on notes and leases payable | (2,697) | (4,479)
Proceeds from, net of payments on, line of credit | 1,500 | 2,700
Payments to counterparties of interest rate swaps, net of amounts received |  | (1,500)
Distributions to noncontrolling interests |  | (26)
Proceeds from issuance of common stock upon exercise of options/warrants | 469 |
Net cash used in financing activities | (728) | (3,305)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (59) | 5
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 69 | (621)
CASH AND CASH EQUIVALENTS, beginning of period | 362 | 2,455
CASH AND CASH EQUIVALENTS, end of period | 431 | 1,834
Parent [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | (1,342) | (111)
Equity in earnings of consolidated subsidiaries | 1,342 | 111
Subsidiary Issuer [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | (1,342) | (111)
Depreciation and amortization | 3,128 | 3,147
Provision for bad debt | 1,385 | 1,267
Equity in earnings of consolidated subsidiaries | (5,668) | (7,082)
Deferred rent amortization | 156 | 36
Amortization of deferred financing cost | 457 | 602
Amortization of bond discount | 400 | 234
Loss on sale and disposal of equipment | 85 | 137
Amortization of cash flow hedge |  | 276
Stock-based compensation | 238 | 294
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions: |  |
Other current assets | (3,611) | 1,286
Other assets | 225 | (19)
Accounts payable, accrued expenses and other | 7,957 | 3,175
Net cash provided by operating activities | 3,410 | 3,242
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Purchase of imaging facilities | (350) |
Purchase of property and equipment | (4,053) | (4,445)
Proceeds from sale of equipment | 145 | 43
Net cash used in investing activities | (4,258) | (4,402)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Principal payments on notes and leases payable | (1,424) | (1,406)
Proceeds from, net of payments on, line of credit | 1,500 | 2,700
Payments to counterparties of interest rate swaps, net of amounts received |  | (1,500)
Proceeds from issuance of common stock upon exercise of options/warrants | 469 |
Net cash used in financing activities | 545 | (206)
EFFECT OF EXCHANGE RATE CHANGES ON CASH | (59) | 5
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | (362) | (1,366)
CASH AND CASH EQUIVALENTS, beginning of period | 362 | 1,366
Guarantor Subsidiaries [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | 5,668 | 7,082
Depreciation and amortization | 11,323 | 11,683
Provision for bad debt | 4,217 | 4,598
Equity in earnings of consolidated subsidiaries | (500) | (200)
Distributions from consolidated subsidiaries |  | 276
Equity in earnings of joint ventures | (1,206) | (1,262)
Distributions from joint ventures | 1,921 | 1,575
Deferred rent amortization | 254 | 252
Loss on sale and disposal of equipment | 85 | (113)
Stock-based compensation | 714 | 881
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions: |  |
Accounts receivable | 1,214 | (3,018)
Other current assets | (1,606) | (1,472)
Other assets | (330) | (45)
Deferred revenue | 3 | 86
Accounts payable, accrued expenses and other | (10,285) | (8,028)
Net cash provided by operating activities | 11,472 | 12,299
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Purchase of imaging facilities | (3,275) | (580)
Purchase of property and equipment | (8,847) | (9,517)
Proceeds from sale of equipment | 125 | 367
Proceeds from sale of noncontrolling interests | 2,640 |
Proceeds from sale of imaging facilities |  | 2,300
Purchase of equity interest in joint ventures | (724) | (920)
Net cash used in investing activities | (10,081) | (8,350)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Principal payments on notes and leases payable | (960) | (3,073)
Distributions to noncontrolling interests |  | (302)
Net cash used in financing activities | (960) | (3,073)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 431 | 881
CASH AND CASH EQUIVALENTS, end of period | 431 | 881
Non-Guarantor Subsidiaries [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | 476 | 159
Depreciation and amortization | 309 | 62
Provision for bad debt | 1,220 | 519
Deferred rent amortization | 23 |
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions: |  |
Accounts receivable | (12,996) | (9,009)
Other current assets | 118 | (497)
Accounts payable, accrued expenses and other | 11,189 | 8,832
Net cash provided by operating activities | 339 | 166
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Purchase of property and equipment | (26) |
Net cash used in investing activities | (26) |
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Principal payments on notes and leases payable | (313) |
Distributions to noncontrolling interests |  | 276
Net cash used in financing activities | (313) | (302)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |  | (136)
CASH AND CASH EQUIVALENTS, beginning of period |  | 1,089
CASH AND CASH EQUIVALENTS, end of period |  | 953
Eliminations [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net (loss) income | (4,826) | (7,171)
Equity in earnings of consolidated subsidiaries | 4,826 | 7,171
Distributions from consolidated subsidiaries |  | (276)
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions: |  |
Net cash provided by operating activities |  | (276)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Net cash used in financing activities |  | $ 276

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- Definition The increase (decrease) during the reporting period in other assets used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets, other noncurrent assets, or a combination of other current and noncurrent assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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