Acquisition (Tables)

12 Months Ended

Dec. 31, 2015

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes the aggregate preliminary purchase price allocation of net tangible and intangible assets acquired during the year ended December 31, 2015.

	(dollars in thousands)
Cash and cash equivalents	$	2,966
Receivable from brokers	5,327
Fixed assets	644
Fees receivable	983
Intangibles	19,900
Other assets	684
Payable to brokers	(153		)
Compensation payable	(1,667		)
Accounts payable, accrued expenses and other liabilities	(3,250		)
Total net assets acquired	$	25,434

Business Acquisition, Pro Forma Information

The following unaudited supplemental pro forma information presents consolidated financial results for the twelve month periods as if the acquisitions were completed as of January 1, 2014. This supplemental pro forma information has been prepared for comparative purposes only and is not intended to be indicative of what the Company's results would have been had the acquisitions been completed on January 1, 2014, nor does it purport to be indicative of any future results.

	For the years ended December 31,
	2015		2014
	(dollars in thousands, except per share data)
	(unaudited)
Revenues	$	496,543	$	473,192
Net income (loss) attributable to Cowen Group, Inc. common stockholders	40,613		167,238
Net income per common share:
Basic	$	0.37	$	1.45
Diluted	$	0.35	$	1.39