Interest Rate Swaps (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Derivative [Line Items] | |||
| Weighted average pay rate on interest-rate swaps | 4.25% | 4.26% | 4.28% |
| Weighted average receive rate on interest-rate swaps | 2.70% | 2.67% | 2.82% |
| Weighted average matuirity (years) | 4 years 1 month 6 days | 5 years 10 months 24 days | 6 years 3 months 18 days |
| Fair value of combined interest-rate swaps | $ 789 | $ 638 | $ 275 |
| Interest rate swaps | |||
| Derivative [Line Items] | |||
| Notional amounts | $ 30,763 | $ 31,459 | $ 25,195 |