Investment Securities (Details Textual) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 28, 2014	Mar. 31, 2014 Security	Mar. 31, 2013	Dec. 31, 2013 Security
Investment Securities (Additional Textual) [Abstract]
Trading securities		$ 7,450,000		$ 7,247,000
Unrealized gains on trading securities		19,500		0
Unrealized losses on trading securities		28,300		0
Net unrealized gains (losses) on trading securities		(8,800)
Carrying value of investment securities for pledge		113,300,000		108,500,000
Investment securities with fair value less than amortized cost		63		83
Minimum assets of trust preferred securities issued by institution		15,000,000,000
Amortized cost	10,000,000	164,487,000		165,219,000
Fair value		162,525,000		160,886,000
Proceeds from sale of securities	10,200,000	10,237,000
Gain on available-for-sale securities	193,000	637,000
Non-accrual investment securities		303,000		1,200,000
Estimated length of interest payment delays		10 years
Minimum
Investment Securities (Additional Textual) [Abstract]
Trust preferred securities in nonaccrual status		1
Maximum
Investment Securities (Additional Textual) [Abstract]
Trust preferred securities in nonaccrual status		2
iTruPS securities
Investment Securities (Additional Textual) [Abstract]
Number of securities owned by company				9
Amortized cost				10,500,000
Fair value				8,500,000
Other than temporary impairment losses				$ 2,000,000