Operating Leases (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||
---|---|---|---|---|---|---|
Dec. 31, 2016
|
Dec. 31, 2015
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
Operating Leased Assets [Line Items] | ||||||
Lease Expiration Date | 2016 | 2012 | ||||
Operating Leases, Rent Expense | $ 0.1 | $ 0.2 | $ 0.2 | $ 0.3 | $ 0.3 | $ 0.2 |