Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock {Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest [Member]	Total
Balance at Beginning at Dec. 31, 2015		$ 2	$ 116,799	$ (6,305)	$ (1,058)	$ (118)	$ 109,320
Balance at Beginning (in shares) at Dec. 31, 2015		16,448,119
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2017
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2017 (in shares)		166,667
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017 (in shares)
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017 (in shares)
Issuance of common stock and common stock warrants for acquisition of Wunderlich on July 3, 2017
Issuance of common stock and common stock warrants for acquisition of Wunderlich on July 3, 2017 (in shares)
Vesting of restricted stock, net of shares withheld for employer taxes
Vesting of restricted stock, net of shares withheld for employer taxes (in shares)		7,306
Offering of common stock, net of offering expenses			22,759				22,759
Offering of common stock, net of offering expenses (in shares)		2,420,980
Share based payments			1,831				1,831
Dividends on common stock				(571)			(571)
Net income for the nine months ended September 30, 2017				9,086		1,209	9,717
Distributions to noncontrolling interest
Foreign currency translation adjustment					(40)		(40)
Balance at End at Sep. 30, 2016		$ 2	141,389	2,210	(1,098)	1,091	143,594
Balance at End (in shares) at Sep. 30, 2016		19,043,072
Balance at Beginning at Dec. 31, 2016		$ 2	141,170	9,887	(1,712)	1,045	150,392
Balance at Beginning (in shares) at Dec. 31, 2016		19,140,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2017			1,151				1,151
Issuance of common stock for acquisition of MK Capital, LLC - contigent equity consideration on February 2, 2017 (in shares)		166,666
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017			1,952				1,952
Issuance of common stock for acquisition of Dialectic general partner interests on April 13, 2017 (in shares)		158,484
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017			73,472				73,472
Issuance of common stock for acquisition of FBR & Co. on June 1, 2017 (in shares)		4,779,354
Issuance of common stock and common stock warrants for acquisition of Wunderlich on July 3, 2017			36,306				36,306
Issuance of common stock and common stock warrants for acquisition of Wunderlich on July 3, 2017 (in shares)		1,974,812
Vesting of restricted stock, net of shares withheld for employer taxes			(2,683)				(2,683)
Vesting of restricted stock, net of shares withheld for employer taxes (in shares)		241,910
Offering of common stock, net of offering expenses
Offering of common stock, net of offering expenses (in shares)
Share based payments			7,679				7,679
Dividends on common stock				(11,600)			(11,600)
Net income for the nine months ended September 30, 2017				17,669		(170)	17,386
Distributions to noncontrolling interest						(922)	(922)
Foreign currency translation adjustment					1,391		1,391
Balance at End at Sep. 30, 2017		$ 2	$ 259,047	$ 15,956	$ (321)	$ (47)	$ 274,637
Balance at End (in shares) at Sep. 30, 2017		26,461,568