Segments (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segments [Abstract]
Number of reportable segments | Segment				2
Selected financial information for reportable segments [Abstract]
Total assets		$ 2,288,954		$ 2,288,954		$ 2,248,730
Interest income		20,131	$ 20,357	39,683	$ 40,640
Net interest income		18,701	18,538	36,792	37,016
Provision for loan losses		(134)	(1,845)	(793)	(1,417)
Income (loss) before income tax		8,243	7,899	13,804	12,504
Net income (loss)		5,619	6,052	9,400	9,190
Other [Member]
Selected financial information for reportable segments [Abstract]
Total assets	[1]	289,977		289,977		286,158
Interest income	[1]	20	16	40	16
Net interest income	[1]	(234)	(326)	(461)	(613)
Provision for loan losses	[1]	0	0	0	0
Income (loss) before income tax	[1]	(356)	(397)	(739)	(802)
Net income (loss)	[1]	(225)	(136)	(469)	(399)
Operating Segments [Member] | IB [Member]
Selected financial information for reportable segments [Abstract]
Total assets		2,214,504		2,214,504		2,174,536
Interest income		18,701	18,511	36,922	36,709
Net interest income		17,717	17,384	34,900	34,467
Provision for loan losses		(138)	(1,838)	(794)	(1,395)
Income (loss) before income tax		8,843	8,014	15,102	12,692
Net income (loss)		5,935	6,115	10,168	9,297
Operating Segments [Member] | Mepco [Member]
Selected financial information for reportable segments [Abstract]
Total assets		63,314		63,314		63,378
Interest income		1,430	1,846	2,761	3,931
Net interest income		1,218	1,480	2,353	3,162
Provision for loan losses		4	(7)	1	(22)
Income (loss) before income tax		(221)	305	(512)	661
Net income (loss)		(77)	201	(269)	444
Elimination [Member]
Selected financial information for reportable segments [Abstract]
Total assets	[2]	(278,841)		(278,841)		$ (275,342)
Interest income	[2]	(20)	(16)	(40)	(16)
Net interest income	[2]	0	0	0	0
Provision for loan losses	[2]	0	0	0	0
Income (loss) before income tax	[2]	(23)	(23)	(47)	(47)
Net income (loss)	[2]	$ (14)	$ (128)	$ (30)	$ (152)

[1] Includes amounts relating to our parent company and certain insignificant operations.

[2] Includes parent company's investment in subsidiaries and cash balances maintained at subsidiary.