Debt Subordinated debt (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 06, 2015 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Dec. 31, 2014 |
|
| Debt Instrument [Line Items] | ||||
| Debt Instrument, Principal Value | $ 90,500 | $ 104,118 | ||
| Interest Payable | $ 0 | 17,400 | ||
| Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum | 3.85% | |||
| Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum | 4.20% | |||
| Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum | 4.27% | |||
| Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum | 4.61% | |||
| Debt Instrument, Periodic Payment, Interest | $ 22,100 | |||
| Subordinated Debt [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Debt Instrument, Principal Value | $ 90,500 | $ 90,500 |