Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 47,003	$ 39,977
Accounts receivable, net of allowance for doubtful accounts	63,810	62,320
Deferred income taxes	17,364	17,364
Prepaid expenses	7,456	5,078
Other receivables	4,235	3,898
Total current assets	139,868	128,637
Equipment, at cost	820,545	827,162
Less accumulated depreciation	(634,129)	(618,601)
Equipment, net	186,416	208,561
Goodwill	56,493	56,493
Other intangible assets, net	115,359	126,931
Deferred financing costs, net	11,485	16,497
Other assets	18,557	23,022
Total assets	528,178	560,141
Current liabilities:
Accounts payable	14,460	15,993
Accrued compensation and related expenses	18,969	22,481
Accrued interest payable	2,507	5,081
Other accrued liabilities	23,363	26,835
Current portion of long-term debt	15,813	13,145
Total current liabilities	75,112	83,535
Long-term debt, net of current portion	354,624	357,056
Senior notes	188,607	188,434
Other liabilities	5,083	4,314
Deferred income taxes	35,900	43,095
Total liabilities	659,326	676,434
Commitments and contingencies (Note 12)
Stockholders’ deficit:
Common stock	524	524
Treasury stock	(2,877)	(2,877)
Additional paid-in capital	22,271	21,507
Accumulated comprehensive loss	(444)	(716)
Accumulated deficit	(198,608)	(183,226)
Total stockholders’ deficit attributable to Alliance HealthCare Services, Inc.	(179,134)	(164,788)
Noncontrolling interest	47,986	48,495
Total stockholders’ deficit	(131,148)	(116,293)
Total liabilities and stockholders’ deficit	$ 528,178	$ 560,141