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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Balance, beginning of the period	$ 72	$ 1,856	$ 36	$ 2,115
Interest payment deferrals	14	33	43	101
Principal repayments	0	(102)	0	(272)
Total net losses included in net income	0	(32)	0	(60)
Total net unrealized gains	8	296	15	167
Balance, end of the period	$ 94	$ 2,051	$ 94	$ 2,051