Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011 Common Stock	Jun. 30, 2010 Common Stock	Jun. 30, 2011 Treasury Stock	Jun. 30, 2010 Treasury Stock	Jun. 30, 2011 Unallocated ESOP Shares	Dec. 31, 2010 Unallocated ESOP Shares	Jun. 30, 2010 Unallocated ESOP Shares	Dec. 31, 2009 Unallocated ESOP Shares
Number of Shares at June 30, 2011, Beginning	15,625,512	15,170,399	4,237,435	4,147,811	118,292	132,296	87,551	105,167
Allocation of ESOP Stock - Shares					(14,004)		(17,616)
Stock Options Exercised - Shares			(14,717)	(26,518)
Shares Issued Under the Directors' Stock Plan - Shares			(3,634)	(2,866)
Shares Issued Under the Employee Stock Purchase Plan - Shares			(10,263)	(9,443)
Shares Issued for Dividend Reinvestment Plans - Shares			(37,689)	(32,801)
Purchases of Treasury Stock - Shares			113,415	61,761
Acquisition of Subsidiary - Shares			(132,504)	(26,240)
Allocation of ESOP Stock - Shares					(14,004)		(17,616)
Number of Shares at June 30, 2011, Ending	15,625,512	15,170,399	4,152,043	4,111,704	118,292	132,296	87,551	105,167
Cash Dividends Paid, per Share	$ 0.50	$ 0.49