Fair Value Measurement - Fair Value, Narrative (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
Fair Value Disclosures [Abstract] | ||||
Value of mortgage-backed securities purchased at premium (in hundredths) | 111.111% | 111.111% | ||
Loss on sale of securities carried at fair value through income | $ 0 | $ 13 | $ 0 | $ 498 |