Fair Value Measurements and Fair Value of Financial Instruments (Schedule of Changes in Investment Securities Available-For-Sale) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance, beginning of the period	$ 44	$ 1,963	$ 36	$ 2,115
Principal interest deferrals	15	34	29	68
Principal repayments	0	(112)	0	(170)
Total net losses included in net income	0	(28)	0	(28)
Total net unrealized (losses) gains	13	(1)	7	(129)
Balance, end of the period	$ 72	$ 1,856	$ 72	$ 1,856