Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Accumulated other comprehensive income — December 31, 2014			$ 25
Other comprehensive income before reclassifications			184
Amounts reclassified from accumulated other comprehensive income			(3)
Net current period change in other comprehensive income	$ 198	$ (4)	181	$ 3
Accumulated other comprehensive income — September 30, 2015	$ 206		$ 206