Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Summary of revenue by segment

The following table summarizes the Company’s revenue by segment:

	Quarter Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Revenue
Imaging	$	98,163	$	94,613	$	198,998	$	186,586
Radiation Oncology	22,501		19,805		42,419		38,214
Total	$	120,664	$	114,418	$	241,417	$	224,800

The following are components of revenue:

	Quarter Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Revenue
MRI revenue	$	49,157	$	47,359	$	99,234	$	93,440
PET/CT revenue	39,573		37,656		80,586		74,406
Radiation Oncology revenue	22,501		19,805		42,419		38,214
Other modalities and other revenue	9,433		9,598		19,178		18,740
Total	$	120,664	$	114,418	$	241,417	$	224,800

Summary of segment income

The following table summarizes the Company’s segment income:

	Quarter Ended June 30,						Six Months Ended June 30,
	2012			2013			2012			2013
Segment income
Imaging	$	37,528		$	38,311		$	76,033		$	73,474
Radiation Oncology	9,800			9,121			17,506			16,806
Corporate / Other	(7,920		)	(8,847		)	(16,373		)	(16,534		)
Total	$	39,408		$	38,585		$	77,166		$	73,746

Reconciliation of Net loss to total segment income

The reconciliation of Net loss to total segment income is shown below:

	Quarter Ended June 30,						Six Months Ended June 30,
	2012			2013			2012			2013
Net loss attributable to Alliance HealthCare Services, Inc.	$	(801	)	$	(12,964	)	$	(5,623	)	$	(15,382	)
Income tax (benefit) expense	(2,427		)	(7,195		)	(5,069		)	(7,333		)
Interest expense and other, net	13,679			11,053			27,367			23,325
Amortization expense	3,994			2,911			8,006			6,705
Depreciation expense	20,693			16,322			42,138			32,838
Share-based payment (included in selling, general and administrative expenses)	(840		)	329			36			735
Noncontrolling interest in subsidiaries	2,728			3,509			4,978			6,339
Restructuring charges (Note 2)	873			1,890			2,995			3,363
Transaction costs	20			—			379			80
Impairment charges	—			4,867			—			4,867
Loss on extinguishment of debt	—			17,069			—			17,069
Other non-recurring charges (included in selling, general and administrative expenses	—			633			—			950
Other non-cash charges (included in other income and expense, net)	1,489			161			1,959			190
Total segment income	$	39,408		$	38,585		$	77,166		$	73,746

Summary of net income (loss) by segment

The following table summarizes the Company’s net income (loss) by segment:

	Quarter Ended June 30,						Six Months Ended June 30,
	2012			2013			2012			2013
Net (loss) income
Imaging	$	15,280		$	18,093		$	31,188		$	37,746
Radiation Oncology	3,771			2,782			5,282			4,031
Corporate / Other	(19,852		)	(33,839		)	(42,093		)	(57,159		)
Total	$	(801	)	$	(12,964	)	$	(5,623	)	$	(15,382	)

Summary of Company's identifiable assets by segment

The following table summarizes the Company’s identifiable assets by segment:

	As of December 31, 2012		As of June 30, 2013
Identifiable assets
Imaging	$	282,906	$	269,426
Radiation Oncology	176,353		182,900
Corporate / Other	100,882		75,852
Total	$	560,141	$	528,178

Summary of company's goodwill by segment

The following table summarizes the Company’s goodwill by segment:

	Imaging			Radiation Oncology			Corporate / Other		Total
Balance at January 1, 2012	$	41,684		$	14,809		$	—	$	56,493
Goodwill acquired during the period	—			—			—		—
Impairment charges	—			—			—		—
Adjustments to goodwill during the period	—			—			—		—
Balance at December 31, 2012	$	41,684		$	14,809		$	—	$	56,493
Goodwill acquired during the period	—			—			—		—
Impairment charges	—			—			—		—
Adjustments to goodwill during the period	—			—			—		—
Balance at June 30, 2013	$	41,684		$	14,809		$	—	$	56,493
Gross goodwill	$	196,026		$	34,711		$	—	$	230,737
Accumulated impairment charges	(154,342		)	(19,902		)	—		(174,244		)
Balance at June 30, 2013	$	41,684		$	14,809		$	—	$	56,493