Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Consolidated net income	$ 29,104	$ 18,376
Non-cash items included in consolidated net income:
Depreciation and amortization	2,752	3,688
Net investment gains	(1,217)	(8,134)
Restricted stock units recognized and common stock issued	28,596	27,734
Deferred taxes	2,064	(1,250)
Deferred gain on sale of certain merchant banking assets	(97)	(129)
Changes in operating assets and liabilities:
Advisory fees receivable	(2,571)	5,967
Other receivables and assets	(1,757)	(2,239)
Compensation payable	(6,070)	(25,896)
Accounts payable and accrued expenses	1,748	4,794
Current income taxes payable	(7,197)	(324)
Net cash provided by operating activities	45,355	22,587
Investing activities:
Purchases of investments	(500)	(6,536)
Proceeds from sales of investments	11,751	16,670
Distributions from investments	922	780
Purchases of property and equipment	(802)	(1,378)
Net cash provided by investing activities	11,371	9,536
Financing activities:
Proceeds from revolving bank loan	70,675	29,945
Repayment of revolving bank loan	(67,550)	(30,220)
Distributions to noncontrolling interests	(311)	0
Dividends paid	(28,121)	(28,999)
Purchase of treasury stock	(45,631)	(19,584)
Net tax benefit (cost) from the delivery of restricted stock units and payment of dividend equivalents	(682)	(3,504)
Net cash used in financing activities	(71,620)	(52,362)
Effect of exchange rate changes on cash and cash equivalents	(1,897)	(201)
Net decrease in cash and cash equivalents	(16,791)	(20,440)
Cash and cash equivalents, beginning of year	50,324	62,050
Cash and cash equivalents, end of year	33,533	41,610
Supplemental disclosure of cash flow information:
Cash paid for interest	427	542
Cash paid for taxes, net of refunds	$ 24,132	$ 11,982