Stockholders' Equity (ESPP) (Details) - ESPP - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 37		$ 42		$ 165	$ 231
Expected dividend yield assumption (in Percent)					0.40%
Expected volatility assumption (in Percent)					24.35%
Risk-free interest rate assumption (in Percent)		0.02%		0.11%	0.18%
Expected life assumption (in Years)		3 months		6 months	9 months
Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate assumption (in Percent)							0.25%
Expected life assumption (in Years)							1 year