Securities (Securities by Contractual Maturity) (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 182,321
Available for sale debt securities maturities 1-5 years amortized cost	420,900
Available for sale debt securities maturities 5-10 years amortized cost	358,203
Available for sale debt securities maturities after 10 years amortized cost	90,237
Available for sale debt securities maturities total amortized cost	1,051,661
Available for sale debt securities maturities within 1 year fair value	183,170
Available for sale debt securities maturities 1-5 years fair value	422,554
Available for sale debt securities maturities 5-10 years fair value	356,788
Available for sale debt securities maturities after 10 years fair value	90,065
Available for sale debt securities fair value	$ 1,052,577

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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