Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Held-to-maturity Securities [Line Items]
Carrying value	$ 12,996		$ 14,798
Cost or amortized cost	12,996		14,798
Fair value	12,996		14,798
Schedule of Trading Securities and Other Trading Assets [Line Items]
Carrying Value	0		0
Cost or amortized cost	0	0	0
Fair Value	0	0	0
Gross unrealized gains (losses) on investment securities held to maturity [Abstract]
Gross unrealized gains (losses)	0		0
Unrealized gains (losses) on investment securities [Abstract]
Cost basis	0	0	0
Current value	0	0	0
Unrealized gains (losses)	0	0
Realized gains (losses) on investment securities [Abstract]
Net sale proceeds	646	3
Cost basis	634	1
Realized gains (losses)	12	2
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Carrying Value	0		0
Cost or amortized cost	0		0
Fair Value	0		0
Unrealized gains (losses) on investment securities [Abstract]
Cost basis	0		0
Current value	0		0
US Treasury Bills [Member]
Held-to-maturity Securities [Line Items]
Carrying value	12,996		14,798
Cost or amortized cost	12,996		14,798
Fair value	$ 12,996		$ 14,798