Stockholders'/Shareholders' Equity	12 Months Ended
Dec. 31, 2020
Federal Home Loan Banks [Abstract]
Stockholders'/Shareholders' Equity	(13) STOCKHOLDERS’/SHAREHOLDERS’ EQUITY In November 2003, the Company announced a stock repurchase program which authorized the repurchase of up to $10,000,000 of common stock. In November 2004, the repurchase program was increased by an additional $10,000,000, which was further increased to a total of $20,000,000 in July 2014, and which was further increased to a total of $26,000,000 in July 2015. As of December 31, 2020, a total of 2,931,125 shares had been repurchased for $24,587,000, and $22,874,509 of shares remain authorized for repurchase under the program. There were no purchases in 2020, 2019, and 2018.

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

Name:	us-gaap_StockholdersEquityNoteDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration