CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 252,998	$ 150,952	$ 175,459
Adjustments to reconcile net income to net cash provided by operating activities:
Write-down of impaired assets		42,373
Depreciation and amortization	13,681	15,093	16,332
Amortization of deferred sales commissions	57,931	53,863	53,855
Share-based compensation	53,179	49,993	46,473
Excess tax benefits from share-based payment arrangements	(12,992)	(6,791)	(8,020)
Gain on sale of available for sale investment securities	(14,417)	(3,163)	(2,258)
Net purchases and sales or maturities of trading securities	(25,959)	(27,470)	59,034
Loss (gain) on trading securities	(3,840)	(5,470)	1,231
Loss on sale and retirement of property and equipment	761	5,326	2,059
Capital gains and dividends reinvested	(268)
Deferred income taxes	(2,982)	(6,236)	2,395
Changes in assets and liabilities:
Cash and cash equivalents - restricted	(28,439)	(42,812)	30,628
Other receivables	(5,690)	(29,422)	(32,260)
Payable to investment companies for securities and payable to customers	24,818	63,828	(2,006)
Receivables from funds and separate accounts	(2,581)	(2,044)	(4,608)
Other assets	(1,139)	2,872	(512)
Deferred sales commissions	(68,470)	(54,430)	(57,933)
Accounts payable and payable to third party brokers	8,613	6,969	2,219
Other liabilities	41,712	20,004	1,051
Net cash provided by operating activities	286,916	233,435	283,139
Cash flows from investing activities:
Purchases of available for sale investment securities	(241,644)	(51,676)	(102,451)
Proceeds from sales and maturities of available for sale investment securities	262,171	49,809	92,282
Additions to property and equipment	(16,905)	(15,262)	(20,073)
Disposition of companies	22,000
Net cash provided (used in) investing activities	25,622	(17,129)	(30,242)
Cash flows from financing activities:
Dividends paid	(96,018)	(171,267)	(68,766)
Repurchase of common stock	(72,132)	(48,688)	(65,463)
Exercise of stock options	135	105	5,080
Excess tax benefits from share-based payment arrangements	12,992	6,791	8,020
Net cash used in financing activities	(155,023)	(213,059)	(121,129)
Net increase in cash and cash equivalents	157,515	3,247	131,768
Cash and cash equivalents at beginning of year, including discontinued operations	330,330	327,083	195,315
Cash and cash equivalents at end of year	487,845	330,330	327,083
Less cash and cash equivalents of discontinued operations at end of year		2,303	3,167
Cash and cash equivalents of continuing operations at end of year	487,845	328,027	323,916
Cash paid for:
Income taxes (net)	124,196	98,181	105,080
Interest	$ 10,297	$ 10,286	$ 10,426