Dividends on Common Stock (Details) - USD ($)			6 Months Ended
Jun. 23, 2020	Mar. 24, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2017
Equity [Abstract]
Dividends declared on common stock (in dollars per share)	$ 0.11	$ 0.11
Dividends on common stock	$ 1,866,000	$ 1,867,000	$ 3,735,000	$ 1,869,000
Authorized repurchase amount, common stock					$ 3,000,000

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration