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Income Taxes (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OtherComprehensiveIncomeLossTax	$ (1,677)	$ (564)
Income Tax Expense (Benefit)	48,390	15,443	$ 25,994
Exempt Income	11,000	10,000	$ 10,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 81	$ 97
Statutary tax rate	39.00%	39.00%	39.00%
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 875	$ 1,300
Interest and Penalties Released Related to Unrecognized Tax Benefits	(386)	(775)	$ (135)
Deferred tax asset, net	150,554	167,300
Deferred tax assets, valuation allowance	4,629	3,135
Benefit from change in enacted tax rate	(4,069)	0	0
Increase in valuation allowance	1,504	(305)	(9)
Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations	$ 466	$ 877	$ 1,363
Effective tax rate	36.44%	22.66%	30.51%
Impact of recent tax legislation changes	2.80%
International Banking Entity [Member]
Exempt Income	$ 5,300	$ 9,600	$ 10,300

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