Guaranteed Preferred Beneficial Interest in Junior Subordinated Debentures ("TRUPs") (Narrative) (Details) - USD ($)			12 Months Ended
	Jun. 15, 2005	Jul. 22, 2004	Dec. 31, 2020
Capital Trust I I
Debt Instrument [Line Items]
Debt instrument, face amount	$ 5,000,000.0
Additional amount contributed to purchase debt	200,000
Junior subordinated notes purchased	$ 5,200,000
Capital Trust I
Debt Instrument [Line Items]
Debt instrument, face amount		$ 7,000,000.0
Additional amount contributed to purchase debt		200,000
Junior subordinated notes purchased		$ 7,200,000
London Interbank Offered Rate (LIBOR) | Capital Trust I I
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			1.70%
London Interbank Offered Rate (LIBOR) | Capital Trust I
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			2.60%