Segment Information -Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 139,162	$ 120,108	$ 321,537	$ 285,873
Wealth Management [Member]
Segment Reporting Information [Line Items]
Revenues	85,296	76,117	167,963	153,408
Wealth Management [Member] | Commission [Member]
Segment Reporting Information [Line Items]
Revenues	38,154	35,252	77,749	72,108
Wealth Management [Member] | Advisory [Member]
Segment Reporting Information [Line Items]
Revenues	35,914	31,522	69,490	63,054
Wealth Management [Member] | Asset-based [Member]
Segment Reporting Information [Line Items]
Revenues	6,784	5,395	12,750	11,213
Wealth Management [Member] | Transaction and Fee [Member]
Segment Reporting Information [Line Items]
Revenues	4,444	3,948	7,974	7,033
Tax Preparation [Member]
Segment Reporting Information [Line Items]
Revenues	53,866	43,991	153,574	132,465
Tax Preparation [Member] | Consumer [Member]
Segment Reporting Information [Line Items]
Revenues	51,848	42,257	140,090	119,728
Tax Preparation [Member] | Professional [Member]
Segment Reporting Information [Line Items]
Revenues	$ 2,018	$ 1,734	$ 13,484	$ 12,737