Summary of Significant Accounting Policies - Summary of Premises and Equipment (Details)	6 Months Ended
	Jun. 30, 2012
Land Improvements [Member] | Minimum [Member]
Premises and equipment useful life	5 years
Land Improvements [Member] | Maximum [Member]
Premises and equipment useful life	31 years
Building Improvements [Member] | Minimum [Member]
Premises and equipment useful life	10 years
Building Improvements [Member] | Maximum [Member]
Premises and equipment useful life	40 years
Machinery And Equipment [Member] | Minimum [Member]
Premises and equipment useful life	5 years
Machinery And Equipment [Member] | Maximum [Member]
Premises and equipment useful life	10 years
Computer Equipment [Member] | Minimum [Member]
Premises and equipment useful life	3 years
Computer Equipment [Member] | Maximum [Member]
Premises and equipment useful life	5 years
Office Furniture And Fixtures [ Member] | Minimum [Member]
Premises and equipment useful life	5 years
Office Furniture And Fixtures [ Member] | Maximum [Member]
Premises and equipment useful life	10 years