Annual report pursuant to Section 13 and 15(d)

Acquisitions (Narrative) (Details)

Acquisitions (Narrative) (Details) $ in Thousands				1 Months Ended					3 Months Ended								5 Months Ended	12 Months Ended
Acquisitions (Narrative) (Details) $ in Thousands	Jan. 02, 2015 USD ($)	Oct. 15, 2014 USD ($) shares	Jul. 31, 2014 USD ($) shares	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jul. 31, 2015 USD ($) earn_out_scenario	Jun. 30, 2015 USD ($) earn_out_scenario	Dec. 31, 2014 USD ($) earn_out_scenario	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) shares
Business Acquisition [Line Items]
Acquisition-related expenses																		$ 1,357	$ 940	$ 2,342
Revenues									$ 297,059	$ 274,323	$ 269,775	$ 265,796	$ 294,333	$ 282,214	$ 296,748	$ 278,823		1,106,953	1,152,118	921,253
Net (loss) income									621	(7,515)	$ (17,801)	$ 2,384	(2,227)	$ (2,937)	(2,477)	$ (3,572)		(22,311)	(11,213)	33,352
Contingent consideration payable				$ 7,144					7,144				2,813					7,144	2,813
Goodwill				124,031				$ 115,238	124,031				$ 125,572				$ 115,238	124,031	125,572	115,238
SSN
Business Acquisition [Line Items]
Consideration transferred	$ 47,287
Goodwill, deductible period for income tax purposes	15 years
Cash paid in acquisition																		0	25,000	0
Revenues																			116,207
Net (loss) income																			1,629
Identifiable intangible assets	$ 57
Goodwill	$ 9,282
SSN \| Promissory Notes
Business Acquisition [Line Items]
Imputed interest rate	5.10%
SSN \| Promissory Notes \| 0.41% Promissory Notes
Business Acquisition [Line Items]
Notes payable-long term	$ 25,000
Interest rate, stated percentage	0.41%
SSN \| Promissory Notes \| 1.74% Promissory Notes
Business Acquisition [Line Items]
Notes payable-long term	$ 20,000
Interest rate, stated percentage	1.74%
Term	4 years
Periodic payment	$ 18,697
Imputed interest rate	5.10%
Amount to be paid in excess of net worth of promissory notes	$ 3,590
Acquisition-related expenses																			$ 51	523
KMS
Business Acquisition [Line Items]
Consideration transferred		$ 24,560
Notes payable-long term		$ 8,000
Interest rate, stated percentage		1.84%
Term		4 years
Periodic payment		$ 7,508
Imputed interest rate		5.50%
Acquisition-related expenses																				520
Cash paid in acquisition		$ 11,000
Stock issued in acquisition, shares \| shares		1,440,922
Stock issued in acquisition, value		$ 6,052
Identifiable intangible assets		192
Goodwill		$ 13,269
KMS \| Promissory Notes
Business Acquisition [Line Items]
Imputed interest rate		5.50%
Highland
Business Acquisition [Line Items]
Consideration transferred			$ 11,566
Notes payable-long term			7,000
Acquisition-related expenses																				$ 566
Cash paid in acquisition			$ 3,613
Stock issued in acquisition, shares \| shares			2,540,762
Stock issued in acquisition, value			$ 7,953
Extinguishment of debt			21,834
Goodwill			$ 11,515
Highland and KMS
Business Acquisition [Line Items]
Stock issued in acquisition, shares \| shares																				3,981,684
Non-recurring income tax benefit eliminated from the pro forma results																				$ 21,238
Revenues																	46,004
Net (loss) income																	59
Wall Street Financial Group
Business Acquisition [Line Items]
Consideration transferred					$ 3,468
Cash paid in acquisition					1,192
Contingent consideration payable					$ 2,276					2,276
Period following closing					3 years
Identifiable intangible assets					$ 3,070					3,070
Goodwill					$ 398					$ 398
Foothill Securities, Inc.
Business Acquisition [Line Items]
Consideration transferred				5,571
Cash paid in acquisition				2,905
Contingent consideration payable				$ 2,666					2,666									2,666
Period following closing				3 years
Identifiable intangible assets				$ 4,640					4,640									4,640
Goodwill				$ 931					$ 931									$ 931
Sunset Financial Services
Business Acquisition [Line Items]
Consideration transferred								4,380
Cash paid in acquisition								1,621
Contingent consideration payable								$ 2,759									2,759			2,759
Period following closing								4 years
Identifiable intangible assets								$ 4,359									4,359			4,359
Goodwill								$ 21									$ 21			$ 21
Number of earn-out scenarios \| earn_out_scenario								3
Select
Business Acquisition [Line Items]
Consideration transferred						$ 2,019
Cash paid in acquisition						503
Contingent consideration payable						1,012
Identifiable intangible assets						$ 2,019
Number of earn-out scenarios \| earn_out_scenario						3
Deferred payment on first anniversary						$ 504
Earn out period						4 years
Dalton Strategic Investment Services, Inc.
Business Acquisition [Line Items]
Consideration transferred							$ 2,689
Cash paid in acquisition							2,100
Contingent consideration payable							589								589
Identifiable intangible assets							2,675								2,675
Goodwill							$ 14								$ 14
Number of earn-out scenarios \| earn_out_scenario							3
Earn out period							3 years