| Loans Receivable (Details 6) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011 | 
|---|---|---|
| Financing receivables on nonaccrual status | $ 11,819 | $ 14,010 | 
| Residential Real Estate Including Home Equity [Member] | ||
| Financing receivables on nonaccrual status | 1,993 | 2,481 | 
| Consumer Loan [Member] | ||
| Financing receivables on nonaccrual status | 0 | 0 | 
| Commercial Real Estate [Member] | ||
| Financing receivables on nonaccrual status | 2,686 | 3,433 | 
| Commercial Participations Purchased [Member] | ||
| Financing receivables on nonaccrual status | 6,633 | 7,170 | 
| Commercial Loan [Member] | ||
| Financing receivables on nonaccrual status | 507 | 926 | 
| Government [Member] | ||
| Financing receivables on nonaccrual status | $ 0 | $ 0 |