Stock-Based Compensation - Option Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 227	$ 0	$ 0
Unrecognized Compensation Expense, Options	590
Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	213	174	0
Unrecognized Compensation Expense, Options	251
Second Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	199	189	167
Unrecognized Compensation Expense, Options	41
Third Prior Year Stock Option Awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based Compensation Expense	$ 24	$ 138	$ 164