2. Investment securities (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value Less than 12 Months	$ 5,985	$ 6,175
Unrealized Losses Less than 12 Months	(24)	(30)
Fair Value More than 12 Months
Unrealized Losses More than 12 Months
Fair Value Total	5,985	6,175
Unrealized Losses Total	(24)	(30)
Government Sponsored Enterprises [Member]
Fair Value Less than 12 Months	5,985	4,984
Unrealized Losses Less than 12 Months	(24)	(22)
Fair Value More than 12 Months
Unrealized Losses More than 12 Months
Fair Value Total	5,985	4,984
Unrealized Losses Total	(24)	(22)
Mortgage Backed Securities [Member]
Fair Value Less than 12 Months		1,191
Unrealized Losses Less than 12 Months		(8)
Fair Value More than 12 Months
Unrealized Losses More than 12 Months
Fair Value Total		1,191
Unrealized Losses Total		$ (8)