CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 2,798	$ (15,824)
Depreciation and amortization	28,217	27,151
Provision for bad debts	16,653	16,145
Equity in earnings of joint ventures	(4,307)	(3,832)
Distributions from joint ventures	3,926	5,758
Deferred rent amortization	1,310	1,537
Amortization of deferred financing cost	1,467	1,365
Amortization of bond discount	119	51
Loss (gain) on sale and disposal of equipment	(1,597)	155
Loss on extinguishment of debt		9,871
Amortization of cash flow hedge	612
Stock-based compensation	1,790	2,027
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions:
Accounts receivable	(36,465)	(18,967)
Other current assets	(1,363)	(2,990)
Other assets	(227)	(386)
Deferred revenue	(230)
Accounts payable and accrued expenses	10,164	435
Net cash provided by operating activities	22,867	22,496
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of imaging facilities	(11,529)	(29,809)
Purchase of property and equipment	(24,915)	(20,818)
Proceeds from insurance claims on damaged equipment	2,469
Proceeds from sale of equipment	291
Purchase of equity interest in joint ventures	(1,500)
Net cash used in investing activities	(35,184)	(50,627)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes and leases payable	(10,602)	(11,334)
Repayment of debt		(412,000)
Proceeds from borrowings		482,360
Deferred financing costs	(217)	(17,239)
Proceeds from, net of payments on, line of credit	25,700
Payments to counterparties of interest rate swaps, net of amounts received	(3,219)	(3,272)
Distributions to noncontrolling interests	(71)	(51)
Proceeds from issuance of common stock upon exercise of options/warrants	242	49
Net cash provided by financing activities	11,833	38,513
EFFECT OF EXCHANGE RATE CHANGES ON CASH	35
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(449)	10,382
CASH AND CASH EQUIVALENTS, beginning of period	627	10,094
CASH AND CASH EQUIVALENTS, end of period	178	20,476
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	$ 23,229	$ 16,857