Business Combinations (Narrative) (Details) (USD $)	7 Months Ended		12 Months Ended			0 Months Ended		0 Months Ended		0 Months Ended			0 Months Ended
	Dec. 31, 2011 location	Dec. 31, 2011 location	Dec. 31, 2011 location	Dec. 31, 2010	Dec. 31, 2009	Aug. 05, 2011 Bank of Whitman [Member] location	Dec. 31, 2011 Bank of Whitman [Member] location	May 27, 2011 First Heritage Bank [Member] location years	Dec. 31, 2011 First Heritage Bank [Member]	May 20, 2011 First Heritage Bank [Member] Maximum [Member]	May 20, 2011 Summit Bank [Member] years	Dec. 31, 2011 Summit Bank [Member]	May 20, 2011 Summit Bank [Member] Maximum [Member]	May 27, 2011 Scenario, Previously Reported [Member] First Heritage Bank [Member]	May 20, 2011 Scenario, Previously Reported [Member] Summit Bank [Member]
Business Acquisition [Line Items]
Acquisition date						August 5, 2011		May 27, 2011			May 20, 2011
Number Of Branch Locations To Be Acquired						9		5
Bargain purchase gain, net of tax			$ 1,830,000	$ 9,818,000	$ 0	$ 1,830,000
Goodwill								4,023,000			1,892,000
Core deposit intangible						3,943,000		1,337,000			509,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount								4,023,000			1,892,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets, Expected Tax Deductible Amount						3,943,000		1,337,000			509,000
Number Of Branch Locations Excluded From Operating Results							11
Percentage of loss shared by FDIC									80.00%			80.00%
FDIC Percentage Of Loss Recoveries									80.00%			80.00%
Term of loss sharing agreements for commercial loans								5			5
Term of Loss sharing agreements for Single family residential mortgage loans								10			10
Commercial Loans Period Of Loss Recovery Provisions								8			8
Single Family Residential Mortgage Loans Period of Loss Recovery Provisions								10			10
FDIC Indemnification Asset, Accrued Interest On Loans, Period of Accrual										90 days			90 days
Number Of Branch Locations	102	102	102
Acquired loans						200,041,000		81,488,000			69,783,000			81,900,000	71,400,000
Other real estate owned covered by loss sharing								8,225,000			2,162,000			8,300,000	2,700,000
FDIC indemnification asset								38,531,000			30,203,000			38,100,000	27,200,000
Other assets						2,447,000		3,657,000			1,813,000			1,700,000	786,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Acquired Loans	369,000	1,700,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans Covered By Loss Sharing	61,000	509,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, FDIC Indemnification Asset	427,000	3,000,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets	$ 1,900,000	$ 1,000,000