Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Operating leases, rent expense, net | $ 2.2 | $ 2.3 | $ 2.2 | |
| Contingent liability premium taxes | 2.5 | |||
| Contingent liability penalties and interest | 0.7 | |||
| TBIC Holding Corporation Inc [Member] | ||||
| Contingent consideration paid | $ 1.2 | |||
| Potential remaining contingent purchase price, maximum | $ 1.8 | |||