Securities (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013 investment
Gross gains	$ 898	$ 24	$ 2,299	$ 126
Gross losses	773	5	1,815	292
Total fair value of investments	$ 43,923		$ 43,923		$ 109,946
Continuous unrealized loss position, fair value (as a percent)			28.00%		61.00%
Number of investments					2
I Pretsl I B 2 Pooled Trust Security
Par value of investment			$ 2,000
Alesco Iv Series B2 Pooled Trust Security
Par value of investment			$ 2,000