Repurchase of Common Stock - Effects on Stockholders' Equity (Details) - USD ($)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
2020 Program
Number of shares repurchased	0	0
Cost of shares repurchased	$ 0	$ 0
2020 Program \| Retained Earnings
Cost of shares repurchased	0	0
2020 Program \| Capital
Cost of shares repurchased	$ 0	$ 0
2008 Program
Number of shares repurchased	0	978
Cost of shares repurchased	$ 0	$ 5,760
2008 Program \| Retained Earnings
Cost of shares repurchased	0	480
2008 Program \| Capital
Cost of shares repurchased	$ 0	$ 6,240

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 3: 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration