Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Goodwill and other intangibles	$ 39,569		$ 39,569		$ 8,813
Total assets	1,672,403		1,672,403		1,136,967
Net interest income	9,749	$ 8,952	18,741	$ 17,808
Provision for loan losses	850	300	1,300	630
Service fees, security gains and other noninterest income	4,409	3,797	8,446	7,230
Noninterest expense	11,507	9,378	20,791	18,519
Amortization and depreciation expense	580		1,047
INCOME BEFORE INCOME TAXES	1,221	3,071	4,049	5,889
Income taxes	409	720	1,026	1,347
NET INCOME	812	2,351	3,023	4,542
Eliminations And Others
Segment Reporting Information [Line Items]
Goodwill and other intangibles	0		0		0
Total assets	417		417		463
Net interest income	(4)	(3)	(7)	(7)
Provision for loan losses	0	0	0	0
Service fees, security gains and other noninterest income	(67)	(88)	(132)	(153)
Noninterest expense	2,182	307	2,577	581
Amortization and depreciation expense	0		0
INCOME BEFORE INCOME TAXES	(2,253)	(398)	(2,716)	(741)
Income taxes	(367)	(127)	(524)	(244)
NET INCOME	(1,886)	(271)	(2,192)	(497)
Trust Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	5,126		5,126		5,285
Total assets	11,291		11,291		10,643
Net interest income	15	14	30	26
Provision for loan losses	0	0	0	0
Service fees, security gains and other noninterest income	1,531	1,574	3,203	3,091
Noninterest expense	1,241	1,193	2,437	2,380
Amortization and depreciation expense	86		171
INCOME BEFORE INCOME TAXES	219	395	625	737
Income taxes	74	135	212	253
NET INCOME	145	260	413	484
Bank Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	31,090		31,090		0
Total assets	1,656,042		1,656,042		1,121,505
Net interest income	9,738	8,941	18,718	17,789
Provision for loan losses	850	300	1,300	630
Service fees, security gains and other noninterest income	2,166	1,756	4,093	3,294
Noninterest expense	7,657	7,471	15,015	14,734
Amortization and depreciation expense	404		696
INCOME BEFORE INCOME TAXES	2,993	2,926	5,800	5,719
Income taxes	613	662	1,222	1,279
NET INCOME	2,380	2,264	4,578	4,440
Retirement Consulting Segment | Operating Segments
Segment Reporting Information [Line Items]
Goodwill and other intangibles	3,353		3,353		3,528
Total assets	4,653		4,653		$ 4,356
Net interest income	0	0	0	0
Provision for loan losses	0	0	0	0
Service fees, security gains and other noninterest income	779	555	1,282	998
Noninterest expense	427	407	762	824
Amortization and depreciation expense	90		180
INCOME BEFORE INCOME TAXES	262	148	340	174
Income taxes	89	50	116	59
NET INCOME	$ 173	$ 98	$ 224	$ 115