Fair Value Measurements (Details 6) - Measurement Input, Discount Rate - Discounted Cash Flow - Non Purchased Credit Impaired Loans and Leases - Fair Value, Measurements, Nonrecurring - Level 3	6 Months Ended
	Jun. 30, 2019
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0375
Minimum | Discount Rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0375
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0800
Maximum | Discount Rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0800
Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0648
Weighted Average | Discount Rates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	0.0648