Fair Value Measurements (Details 2) - Trust preferred securities $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Significant unobservable inputs (Level 3) used in the valuation of assets and liabilities measured at fair value on a recurring basis
Fair Value	$ 9,388
Valuation Technique	Discounted cash flows
Significant Unobservable Inputs	Default rate
Minimum
Significant unobservable inputs (Level 3) used in the valuation of assets and liabilities measured at fair value on a recurring basis
Range of Inputs (percent)	0.00%
Maximum
Significant unobservable inputs (Level 3) used in the valuation of assets and liabilities measured at fair value on a recurring basis
Range of Inputs (percent)	100.00%