Accumulated Other Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ 107	[1]
Other comprehensive income before reclassifications	25	[1]
Amount reclassified from accumulated other comprehensive income		[1]
Net current-period other comprehensive income (loss)	25	[1]	107
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	132	[1]
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	107	[1]
Other comprehensive income before reclassifications	25	[1]
Amount reclassified from accumulated other comprehensive income		[1]
Net current-period other comprehensive income (loss)	25	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ 132	[1]

[1] All amounts are net of tax. Amounts in parentheses indicate a reduction of other comprehensive income.