CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Common Stock [Member] CapitalMark Bank & Trust [Member]	Common Stock [Member] Magna Bank [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] CapitalMark Bank & Trust [Member]	Additional Paid-in Capital [Member] Magna Bank [Member]	Retained Earnings [Member]	Retained Earnings [Member] CapitalMark Bank & Trust [Member]	Retained Earnings [Member] Magna Bank [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] CapitalMark Bank & Trust [Member]	Accumulated Other Comprehensive Income [Member] Magna Bank [Member]	Total	CapitalMark Bank & Trust [Member]	Magna Bank [Member]
Balances at Dec. 31, 2012	$ 34,696,597			$ 543,760,439			$ 87,386,689			$ 13,227,634			$ 679,071,359
Balances (in shares) at Dec. 31, 2012	34,696,597
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits	$ 280,008			3,961,042			0			0			4,241,050
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits (in shares)	280,008
Issuance of restricted common shares, net of forfeitures	$ 303,111			(303,111)			0			0			0
Issuance of restricted common shares, net of forfeitures (in shares)	303,111
Restricted shares withheld for taxes and related tax benefit	$ (57,775)			(1,288,367)			0			0			(1,346,142)
Restricted shares withheld for taxes and related tax benefit (in shares)	(57,775)
Compensation expense for restricted shares	$ 0			4,069,662			0			0			4,069,662
Compensation expense for stock options	0			12,470			0			0			12,470
Common dividends paid	0			0			(2,814,691)			0			(2,814,691)
Net income (loss)	0			0			57,726,201			0			57,726,201
Other comprehensive income (loss)										(17,252,248)			(17,252,248)
Ending Balances at Dec. 31, 2013	$ 35,221,941			550,212,135			142,298,199			(4,024,614)			723,707,661
Balances (in shares) at Dec. 31, 2013	35,221,941
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits	$ 302,403			8,444,894			0			0			8,747,297
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits (in shares)	302,403
Issuance of restricted common shares, net of forfeitures	$ 277,187			(277,187)			0			0			0
Issuance of restricted common shares, net of forfeitures (in shares)	277,187
Restricted shares withheld for taxes and related tax benefit	$ (69,048)			(2,256,560)			0			0			(2,325,608)
Restricted shares withheld for taxes and related tax benefit (in shares)	(69,048)
Compensation expense for restricted shares	$ 0			5,308,167			0			0			5,308,167
Common dividends paid							(11,398,285)						(11,398,285)
Net income (loss)							70,471,167						70,471,167
Other comprehensive income (loss)	0			0			0			8,182,982			8,182,982
Ending Balances at Dec. 31, 2014	$ 35,732,483			561,431,449			201,371,081			4,158,368			802,693,381
Balances (in shares) at Dec. 31, 2014	35,732,483
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits	$ 304,313			7,187,629			0			0			7,491,942
Exercise of employee common stock options, stock appreciation rights, common stock warrants and related tax benefits (in shares)	304,313
Issuance of restricted common shares, net of forfeitures	$ 257,218			(257,218)			0			0			0
Issuance of restricted common shares, net of forfeitures (in shares)	257,218
Common stock issued in conjunction with acquisition		$ 3,306,184	$ 1,371,717		$ 202,648,875	$ 62,166,214		$ 0	$ 0		$ 0	$ 0		$ 205,955,059	$ 63,537,931
Common stock issued in conjunction with acquisition (in shares)														3,306,184	1,371,717
Restricted shares withheld for taxes and related tax benefit	$ (65,851)			(901,502)			0			0			(967,353)
Restricted shares withheld for taxes and related tax benefit (in shares)	(65,851)
Compensation expense for restricted shares	$ 0			7,341,603			0			0			7,341,603
Common dividends paid	0			0			(18,307,075)			0			(18,307,075)
Net income (loss)	0			0			95,509,402			0			95,509,402
Other comprehensive income (loss)	0			0			0			(7,643,590)			(7,643,590)
Ending Balances at Dec. 31, 2015	$ 40,906,064			$ 839,617,050			$ 278,573,408			$ (3,485,222)			$ 1,155,611,300
Balances (in shares) at Dec. 31, 2015	40,906,064