Offsetting Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Offsetting [Abstract]

Offsetting of Financial Assets

Offsetting of assets as of December 31, 2017 and 2016 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments			Cash Collateral Received			Net Amount
	(in thousands)
December 31, 2017
Securities borrowed	$	85,371	$	—	$	85,371	$	(82,353	)	$	—		$	3,018
Derivatives	$	11,619	$	—	$	11,619	$	—		$	(519	)	$	11,100
Long exchange-traded options	$	4,981	$	—	$	4,981	$	—		$	—		$	4,981
December 31, 2016
Securities borrowed	$	82,814	$	—	$	82,814	$	(80,277	)	$	—		$	2,537
Derivatives	$	8,413	$	—	$	8,413	$	—		$	(810	)	$	7,603
Long exchange-traded options	$	3,106	$	—	$	3,106	$	—		$	—		$	3,106

Offsetting of Financial Liabilities

Offsetting of liabilities as of December 31, 2017 and 2016 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments			Cash Collateral Pledged			Net Amount
	(in thousands)
December 31, 2017
Securities loaned	$	37,960	$	—	$	37,960	$	(37,922	)	$	—		$	38
Derivatives	$	14,323	$	—	$	14,323	$	—		$	(8,794	)	$	5,529
Short exchange-traded options	$	13,585	$	—	$	13,585	$	—		$	—		$	13,585
December 31, 2016
Securities loaned	$	—	$	—	$	—	$	—		$	—		$	—
Derivatives	$	8,649	$	—	$	8,649	$	—		$	(6,239	)	$	2,410
Short exchange-traded options	$	692	$	—	$	692	$	—		$	—		$	692