Securities Sold Under Agreements to Repurchase - Summary of Repurchase Liability by Maturity (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Securities sold under agreements to repurchase
Repurchase Liability	$ 55,000	$ 55,000
Repurchase liability maximum	90.00%
Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.57%	1.57%
Over 1 year to 2 years
Securities sold under agreements to repurchase
Repurchase Liability	$ 25,000	$ 25,000
Over 1 year to 2 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.46%	1.46%
Over 2 years to 3 years
Securities sold under agreements to repurchase
Repurchase Liability	$ 20,000
Over 2 years to 3 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.66%
Over 3 years to 4 years
Securities sold under agreements to repurchase
Repurchase Liability	$ 10,000	$ 25,000
Over 3 years to 4 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.65%	1.66%
Over 4 years to 5 years
Securities sold under agreements to repurchase
Repurchase Liability		$ 5,000
Over 4 years to 5 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)		1.65%