CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 19,607	$ 18,131
Accounts receivable	14,840us-gaap_AccountsReceivableNetCurrent	14,540us-gaap_AccountsReceivableNetCurrent
Investments, at fair value	64,039us-gaap_ShortTermInvestments	79,620us-gaap_ShortTermInvestments
Deferred income taxes	4,826	4,060
Other current assets	2,538us-gaap_OtherAssetsCurrent	2,413us-gaap_OtherAssetsCurrent
Total current assets	105,850us-gaap_AssetsCurrent	118,764us-gaap_AssetsCurrent
Goodwill	11,255us-gaap_Goodwill	11,255us-gaap_Goodwill
Deferred income taxes	3,542	3,792
Intangible assets, net	3,340us-gaap_FiniteLivedIntangibleAssetsNet	3,430us-gaap_FiniteLivedIntangibleAssetsNet
Property and equipment, net of accumulated depreciation of $2,847 and $2,720	2,871us-gaap_PropertyPlantAndEquipmentNet	2,633us-gaap_PropertyPlantAndEquipmentNet
Total assets	126,858us-gaap_Assets	139,874us-gaap_Assets
Current Liabilities:
Accounts payable and accrued liabilities	3,694	2,334
Dividends payable	4,792us-gaap_DividendsPayableCurrent	4,868us-gaap_DividendsPayableCurrent
Compensation and benefits payable	5,284	18,504
Income taxes payable	2,031us-gaap_AccruedIncomeTaxesCurrent	1,498us-gaap_AccruedIncomeTaxesCurrent
Total current liabilities	15,801us-gaap_LiabilitiesCurrent	27,204us-gaap_LiabilitiesCurrent
Accrued dividends	914whg_DividendsPayableNonCurrent	1,450whg_DividendsPayableNonCurrent
Deferred rent	1,216us-gaap_DeferredRentCreditNoncurrent	1,213us-gaap_DeferredRentCreditNoncurrent
Total liabilities	17,931us-gaap_Liabilities	29,867us-gaap_Liabilities
Commitments and contingencies (Note 11)
Stockholders' Equity:
Common stock, $0.01 par value, authorized 25,000,000 shares, issued 9,280,996 and outstanding 8,467,815 shares at March 31, 2015; issued 9,010,255 and outstanding 8,308,460 shares at December 31, 2014	93us-gaap_CommonStockValue	90us-gaap_CommonStockValue
Additional paid-in capital	125,661	119,859
Treasury stock, at cost - 813,181 shares at March 31, 2015; 701,795 shares at December 31, 2014	(35,893)us-gaap_TreasuryStockValue	(29,028)us-gaap_TreasuryStockValue
Accumulated other comprehensive loss	(2,619)	(1,231)
Retained earnings	21,685	20,317
Total stockholders' equity	108,927us-gaap_StockholdersEquity	110,007us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 126,858	$ 139,874

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant