CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ 1,028	$ 7,728
Depreciation and amortization	44,050	43,154
Provision for bad debt	20,810	19,453
Equity in earnings of joint ventures	(4,481)	(4,157)
Distributions from joint ventures	5,624	5,526
Deferred rent amortization	2,893	2,990
Amortization of deferred financing cost	1,676	1,803
Amortization of bond and term loan discount	1,651	706
Loss on sale and disposal of equipment	357	255
Gain on sale of imaging centers	(2,108)	0
Gain on de-consolidation of joint venture	0	(2,777)
Amortization of cash flow hedge	0	827
Stock-based compensation	2,045	2,139
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in purchase transactions:
Accounts receivable	(25,096)	(18,362)
Other current assets	(1,504)	(433)
Other assets	172	(51)
Deferred taxes	575
Deferred revenue	175	72
Accounts payable, accrued expenses and other	(5,357)	(3,255)
Net cash provided by operating activities	42,510	55,618
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of imaging facilities	(5,918)	(10,617)
Purchase of property and equipment	(39,921)	(35,279)
Proceeds from sale of equipment	510	841
Proceeds from sale of imaging facilities	3,920	2,300
Proceeds from sale of joint venture interests	2,640	1,800
Purchase of equity interest in joint ventures	(1,803)	(2,756)
Net cash used in investing activities	(40,572)	(43,711)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on notes and leases payable	(7,476)	(11,180)
Deferred financing costs	(432)	0
Proceeds from borrowings upon refinancing	35,122	0
Net (payments on) proceeds from line of credit	(29,600)	1,800
Payments to counterparties of interest rate swaps, net of amounts received	0	(4,587)
Distributions to noncontrolling interests	(11)	(67)
Proceeds from issuance of common stock upon exercise of options/warrants	469	0
Net cash used in financing activities	(1,928)	(14,034)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(104)	60
NET DECREASE IN CASH AND CASH EQUIVALENTS	(94)	(2,067)
CASH AND CASH EQUIVALENTS, beginning of period	362	2,455
CASH AND CASH EQUIVALENTS, end of period	268	388
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	$ 26,614	$ 32,074