The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Employee Benefits (Details Textual) - USD ($)		12 Months Ended
Employee Benefits (Details Textual) - USD ($)	Nov. 18, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		250,000
Amount of shares purchased in the open market		$ 2,851,000	$ 2,990,000	$ 12,952,000
Dividends payable		1,745,000	1,800,000
Accrued dividends		701,000	1,133,000
Accrued liability		400,000
Stock-based compensation expense		6,001,000	5,835,000	6,701,000
Amortization of intangible assets		1,889,000	1,624,000	1,721,000
Mutual fund incentive award expense		$ 600,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 468,000
Stock Repurchased During Period, Shares		27,474
Treasury Stock, Value, Acquired, Cost Method		$ 700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		56,625
Restricted Stock Award, Forfeitures		$ (1,300,000)
General and Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Amortization of intangible assets		$ 1,900,000	$ 1,600,000	$ 1,700,000
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total number of shares that may be issued under the stock based compensation Plan (including predecessor plans to the Plan)		5,898,100
Shares remain available for issuance		157,000
Vested, shares		186,386
Remaining unrecognized compensation cost		$ 12,100,000
Remaining unrecognized compensation cost recognized over a remaining weighted average period		1 year
Number of vested shares from employees on the date vesting		37,603
Nonvested restricted shares (in shares)		1,098,008	415,494
Restricted Stock \| Employee
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares granted to employees vesting period		3 years
Restricted Stock \| Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares granted to employees vesting period		1 year
Mutual Fund [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Mutual fund vesting period		2 years
Benefit Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Percentage of compensation		6.00%