Disclosures About Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) - Fair Value, Measurements, Recurring - Available for Sale Securities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of the period	$ 6,198	$ 11,494	$ 6,646	$ 9,977
Included in net income
Included in other comprehensive income	$ 50	$ 835	$ 141	$ 2,893
Purchases, issuances and settlements
Transfers in/(out) of Level 3
Principal payments	$ (220)	$ (4,796)	$ (759)	$ (5,337)
Ending balance	$ 6,028	$ 7,533	$ 6,028	$ 7,533