Benefit Plans Employee Stock Ownership Plans (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Compensation and Retirement Disclosure [Abstract] | |||
| ESOP contribution expense | $ 1,400 | $ 1,216 | $ 1,087 |
| Dividends on unallocated ESOP shares used to reduce ESOP contribution | $ 210 | $ 197 | $ 132 |
| Allocated shares | 931,040 | 818,187 | |
| Unallocated shares | 761,760 | 874,613 | |
| Total ESOP shares | 1,692,800 | 1,692,800 | |
| Fair value of unallocated shares | $ 10,634 | $ 10,530 | |
| Textuals [Abstract] | |||
| Amount borrowed by ESOP | $ 16,900 | ||
| Shares acquired by ESOP | 1,692,800 | ||
| Price per share of shares acquired by ESOP | $ 10.00 | ||
| Fixed interest rate ESOP debt | 4.88% | ||
| Principal and interest payments from ESOP | $ 1,600 | $ 1,600 | |