Disclosures About Fair Value of Financial Instruments - Reconciliation of beginning and ending balances of recurring fair value measurements using significant unobservable (Details 1) (Fair Value, Measurements, Recurring, Available-for-Sale Securities, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Measurements, Recurring | Available-for-Sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,197	$ 1,090
Total realized and unrealized gains and losses
Amortization included in net income	12	11
Unrealized gains included in other comprehensive income	128	150
Settlements including pay downs	(69)	(54)
Transfers in and/or out of Level 3
Ending balance	1,268	1,197
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date