Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total Common Shareholders' Equity	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2018			12,995,397
Beginning Balance at Dec. 31, 2018		$ 730,416	$ 195	$ 796,363	$ 182,552	$ (300,268)	$ (1,398)	$ 677,444	$ 52,972
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		18,806			19,422			19,422	(616)
Dividends		(19,947)			(19,947)			(19,947)
Amortization/issuance of restricted stock		23,826		23,826				23,826
Repurchase of common stock through share repurchase program (in shares)			(501)
Repurchase of common stock through share repurchase program		(32)				(32)		(32)
Issuance of treasury shares for restricted stock vestings (in shares)			1,035,360
Issuance of treasury shares for restricted stock vestings		$ 0		(48,092)		48,092		0
Repurchase of common stock from employees (in shares)		(563,284)	(563,284)
Repurchase of common stock from employees		$ (39,695)				(39,695)		(39,695)
Shares reserved/issued for director compensation (in shares)			1,263
Shares reserved/issued for director compensation		87		87				87
Other comprehensive income/(loss)		215					215	215
Fund capital distributions, net		(5)						0	(5)
Ending Balance (in shares) at Mar. 31, 2019			13,468,235
Ending Balance at Mar. 31, 2019		713,671	$ 195	772,184	182,027	(291,903)	(1,183)	661,320	52,351
Beginning Balance (in shares) at Dec. 31, 2019			13,717,315
Beginning Balance at Dec. 31, 2019		806,528	$ 195	757,669	258,669	(284,378)	(872)	731,283	75,245
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		(22,255)			(14,727)			(14,727)	(7,528)
Dividends		(16,066)			(16,066)			(16,066)
Amortization/issuance of restricted stock	[1]	44,195		44,195				44,195
Repurchase of common stock through share repurchase program (in shares)			(128,865)
Repurchase of common stock through share repurchase program		(9,225)				(9,225)		(9,225)
Issuance of treasury shares for restricted stock vestings (in shares)			254,111
Issuance of treasury shares for restricted stock vestings		$ 0		(12,551)		12,551		0
Issuance of treasury shares for deal consideration (in shares)		34,205	34,205
Issuance of treasury shares for deal consideration		$ 2,723		1,049		1,674		2,723
Repurchase of common stock from employees (in shares)		(94,615)	(94,615)
Repurchase of common stock from employees		$ (8,068)				(8,068)		(8,068)
Shares reserved/issued for director compensation (in shares)			1,779
Shares reserved/issued for director compensation		116		116				116
Other comprehensive income/(loss)		(672)					(672)	(672)
Fund capital distributions, net		(1,201)						0	(1,201)
Ending Balance (in shares) at Mar. 31, 2020			13,783,930
Ending Balance at Mar. 31, 2020		$ 796,075	$ 195	$ 790,478	$ 227,876	$ (287,446)	$ (1,544)	$ 729,559	$ 66,516

[1] Includes amortization of restricted stock as part of deal consideration for the acquisition of Sandler O'Neill. See Note 3 for further discussion.