Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (24)
Reclassifications from accumulated other comprehensive income (loss)	(1)	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	22
Ending balance	(3)
Unrealized Gains/(Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(24)
Reclassifications from accumulated other comprehensive income (loss)	(1)	[1]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	22
Ending balance	$ (3)

[1] Amounts reclassified for previously unrealized losses on available-for-sale securities are included in "Interest income /(expense) and other, net" in the consolidated statements of operations.