Earnings Per Common Share And Share Awards (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Common Share And Share Awards [Line Items]
Incremental dilutive potential common shares, calculated using treasury stock method	34,066	20,952	31,413	17,075
Anti-dilutive shares excluded from computation of diluted earnings per share	0	9,500	5,000	11,500
SARs and options vesting period			1 year
Shares issued in period	3,000	3,000
Weighted-average fair values of stock appreciation rights issued	$ 18.84	$ 15.55
Compensation expense relating to SARs or options vesting			$ 37,000	$ 106,000
Total unrecognized compensation cost related to unvested share-based compensation arrangements granted under stock award plans	$ 62,000		$ 62,000
Weighted-average period of unrecognized compensation cost recognition			6 months
Minimum [Member]
Earnings Per Common Share And Share Awards [Line Items]
Annual rate at which stock appreciation rights and options are exercisable and vest			10.00%
SARs and options expiration period			5 years
Maximum [Member]
Earnings Per Common Share And Share Awards [Line Items]
Maximum shares of Company stock to be granted to key employees or directors			500,000
Annual rate at which stock appreciation rights and options are exercisable and vest			20.00%
SARs and options expiration period			10 years