Description of Business and Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
Dec. 31, 2012 Reporting
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	7 years
Description of Business and Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Days from origination after which mortgage loan are sold	30 days
Loan upon which a default of principal or interest has existed for a period	90 days
Number of reporting units without carrying amounts	0
Core deposit intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	6 years
Customer relationship intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	11 years 1 month 6 days
Minimum [Member] \| Core deposit intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	7 years
Minimum [Member] \| Customer relationship intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	12 years
Maximum [Member] \| Core deposit intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	10 years
Maximum [Member] \| Customer relationship intangibles [Member]
Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]
Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives	18 years

Description of Business and Summary of Significant Accounting Policies (Details Textual)

12 Months Ended

Dec. 31, 2012

Reporting

Description of Business and Summary of Significant Accounting Policies (Textual) [Abstract]

Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives

7 years

Description of Business and Summary of Significant Accounting Policies (Additional Textual) [Abstract]

Days from origination after which mortgage loan are sold

30 days

Loan upon which a default of principal or interest has existed for a period

90 days