Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Tax credit carryforwards
Total tax credit carryforwards	$ 5,296
Low income housing credits
Tax credit carryforwards
Total tax credit carryforwards	4,339
Alternative Minimum Tax credits
Tax credit carryforwards
Total tax credit carryforwards	870
State tax credits, net of federal tax effects
Tax credit carryforwards
Total tax credit carryforwards	85
New Hire Retention Credit
Tax credit carryforwards
Total tax credit carryforwards	$ 2