Information on operating segments and a reconciliation to income (loss) from operations for the periods indicated are as follows:



	Year Ended December 31,
	2015		2014			2013
	(amounts in thousands)
Revenue from unaffiliated customers:
Nurse and Allied Staffing (a)	$	621,258	$	459,195		$	274,219
Physician Staffing (a)	115,336		121,145			126,125
Other Human Capital Management Services	30,827		37,485			37,967
	$	767,421	$	617,825		$	438,311
Contribution income: (b)
Nurse and Allied Staffing (a)	$	54,499	$	36,486		$	18,668
Physician Staffing (a)	10,213		6,540			8,695
Other Human Capital Management Services	1,863		514			746
	66,575		43,540			28,109

Unallocated corporate overhead	31,484		27,770			21,844
Depreciation	3,856		3,866			3,886
Amortization	4,210		3,575			2,294
Loss on sale of business (c)	2,184		—			—
Acquisition and integration costs	902		7,957			473
Restructuring costs	1,274		840			484
Legal settlement charge	—		—			750
Impairment charges (d)	2,100		10,000			6,400
Income (loss) from operations	$	20,565	$	(10,468	)	$	(8,022	)

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(a)	Effective January 1, 2015, the Company reclassified a portion of its business from the Physician Staffing segment to the Nurse and Allied Staffing segment. For the years ended December 31, 2014 and 2013, revenue of $2.2 million and $2.7 million, respectively, and contribution income of $0.2 million for both 2014 and 2013, have been reclassified to conform to the current period presentation.

(b)

The Company defines contribution income as income or loss from operations before depreciation, amortization, loss on sale of business, acquisition and integration costs, restructuring costs, legal settlement charges, impairment charges and corporate expenses not specifically identified to a reporting segment. Contribution income is a financial measure used by management when assessing segment performance and is provided in accordance with ASC 280, Segment Reporting Topic of the FASB ASC.


(c)	On August 31, 2015, the Company completed the sale of CCE, and recognized a pre tax loss of $2.2 million related to the divestiture of the business. See Note 4 - Disposal and Discontinued Operations.


(d)	During the years ended December 31, 2015, 2014 and 2013, the Company recorded trade name impairment charges of $2.1 million, $10.0 million and $6.4 million, respectively. See Note 5 - Goodwill, Trade Names, and Other Identifiable Intangible Assets.