CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (Unaudited) (Parenthetical)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Additional Paid-in Capital [Member]
Number of shares of treasury stock distributed for director's compensation ( in shares)	10,238	10,378
Number of shares of treasury stock for employee compensation, (in shares)	3,453	2,392
Number shares of treasury stock for director's deferred compensation, (in shares)	3,240	286
Issuance of shares related to FOFC Merger (in shares)		1,009,942
Retained Earnings [Member]
Cash dividends declared (in dollars per share)	0.5	0.5
Treasury Stock [Member]
Number of shares of treasury stock distributed for director's compensation ( in shares)	10,238	10,378
Number of shares of treasury stock for employee compensation, (in shares)	3,453	2,392
Number shares of treasury stock for director's deferred compensation, (in shares)	3,240	286
Number of treasury stock shares purchased (in shares)	19,098	7,844
Common Stock [Member]
Issuance of shares related to FOFC Merger (in shares)		1,009,942