Investment Securities - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Investment Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of available-for-sale investment securities	$ 10,015,000	$ 15,014,000
Available-for-sale Securities, Gross Realized Gains	0	2,000
Trading Securities	923,000		928,000
Floating Interest Rate [Member] | Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Trading Securities Amortized Cost	3,270,000		3,553,000
Trading Securities	$ 923,000		$ 928,000
Trading securities weighted-average yield	4.24%		4.25%