Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)

12 Months Ended

Dec. 31, 2016

Trading Securities Balance Sheet Reported Amounts [Abstract]

Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased

The components of financial instruments owned and financial instruments sold, but not yet purchased, at December 31, 2016 and 2015, are as follows (in thousands):

	December 31,
	2016		2015
Financial instruments owned:
U.S. government securities	$	9,951	$	45,167
U.S. government agency securities		89,833		116,949
Mortgage-backed securities:
Agency		305,774		205,473
Non-agency		28,402		33,319
Corporate securities:
Fixed income securities		299,946		203,910
Equity securities		32,044		31,642
State and municipal securities		159,095		112,983
	$	925,045	$	749,443
Financial instruments sold, but not yet purchased:
U.S. government securities	$	362,536	$	186,030
U.S. government agency securities		20,549		—
Mortgage-backed securities:
Agency		94,552		50,830
Non-agency		1		—
Corporate securities:
Fixed income securities		202,968		255,700
Equity securities		18,395		29,184
State and municipal securities		31		—
	$	699,032	$	521,744