Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 26,961	$ 23,678
Adjustments to reconcile net income to net cash provided by operating activities:
Settlement gain	(6,909)
Deferred income taxes	3,823	14,761
Stock-based compensation	10,558	11,092
Depreciation and amortization	1,042	978
Other	524	(248)
Changes in operating assets and liabilities:
Securities owned, at fair value	1,146
Accounts receivable	(1,969)	10,207
Prepaid expenses	(361)	(1,370)
Other assets	(31)	(1)
Acquisition payable	(3,545)	(218)
Fund management and administration payable	561	414
Compensation and benefits payable	115	(18,944)
Income taxes payable	(628)	2,260
Securities sold, but not yet purchased, at fair value	(1,249)
Accounts payable and other liabilities	1,041	1,336
Net cash provided by operating activities	31,079	43,945
Cash flows from investing activities:
Purchase of fixed assets	(253)	(654)
Purchase of securities held-to-maturity	(3,009)	(6,048)
Purchase of securities available-for-sale	(76,776)
Purchase of investment	(5,000)
Proceeds from held-to-maturity securities maturing or called prior to maturity	2,162	13,579
Proceeds from sales and maturities of securities available-for-sale	65,067
Acquisition less cash acquired		(11,818)
Net cash used in investing activities	(17,809)	(4,941)
Cash flows from financing activities:
Dividends paid	(32,825)	(32,748)
Shares repurchased	(4,178)	(39,116)
Proceeds from exercise of stock options	53	107
Net cash used in financing activities	(36,950)	(71,757)
Increase in cash flow due to changes in foreign exchange rate	1,179	815
Net decrease in cash and cash equivalents	(22,501)	(31,938)
Cash and cash equivalents - beginning of period	92,722	210,070
Cash and cash equivalents - end of period	70,221	178,132
Supplemental disclosure of cash flow information:
Cash paid for taxes	$ 22,130	$ 6,664