Segment Reporting (Business Segment Profit (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net interest income (expense)	$ 30,085	$ 27,422	$ 59,713	$ 54,417
Provision for loan losses	(40)	(3,832)	(2,989)	(6,613)
Noninterest income	8,549	9,333	17,533	17,169
Noninterest expense	(23,445)	(23,941)	(47,552)	(44,883)
Income before income taxes	15,149	8,982	26,705	20,090
Income tax (expense) benefit	(2,979)	(2,736)	(5,247)	(5,901)
Net income	12,170	6,246	21,458	14,189
Banking [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	30,703	28,039	60,949	55,652
Provision for loan losses	(40)	(3,832)	(2,989)	(6,613)
Noninterest income	6,301	6,215	12,805	11,793
Noninterest expense	(20,177)	(19,840)	(40,660)	(38,324)
Income before income taxes	16,787	10,582	30,105	22,508
Income tax (expense) benefit	(3,504)	(3,048)	(6,136)	(6,621)
Net income	13,283	7,534	23,969	15,887
Non-Banking [Member]
Segment Reporting Information [Line Items]
Noninterest income	2,385	2,040	5,009	4,445
Noninterest expense	(2,150)	(3,428)	(4,815)	(5,262)
Income before income taxes	235	(1,388)	194	(817)
Income tax (expense) benefit	(59)	(74)	(51)	(296)
Net income	176	(1,462)	143	(1,113)
Holding Company and Other [Member]
Segment Reporting Information [Line Items]
Net interest income (expense)	(618)	(617)	(1,236)	(1,235)
Noninterest income	(137)	1,078	(281)	931
Noninterest expense	(1,118)	(673)	(2,077)	(1,297)
Income before income taxes	(1,873)	(212)	(3,594)	(1,601)
Income tax (expense) benefit	584	386	940	1,016
Net income	$ (1,289)	$ 174	$ (2,654)	$ (585)