CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - 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 Comp. Income (Loss), Net [Member]	Accumulated Other Comp. Income (Loss), Net [Member] CapitalMark Bank & Trust [Member]	Accumulated Other Comp. Income (Loss), Net [Member] Magna Bank [Member]	Total	CapitalMark Bank & Trust [Member]	Magna Bank [Member]
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 and related tax benefits	$ 218,108			6,347,045			0			0			6,565,153
Exercise of employee common stock options and related tax benefits (in shares)	218,108
Common dividends paid	$ 0			0			(8,535,894)			0			(8,535,894)
Issuance of restricted common shares, net of forfeitures	$ 281,416			(281,416)			0			0			0
Issuance of restricted common shares, net of forfeitures (in shares)	281,416
Restricted shares withheld for taxes and related tax benefit	$ (66,924)			(2,177,101)			0			0			(2,244,025)
Restricted shares withheld for taxes and related tax benefit (in shares)	(66,924)
Compensation expense for restricted shares	$ 0			3,969,973			0			0			3,969,973
Net income	0			0			51,733,929			0			51,733,929
Other comprehensive income (loss)	0			0			0			6,737,354			6,737,354
Ending Balances at Sep. 30, 2014	$ 35,654,541			558,070,636			185,496,234			2,712,740			781,934,151
Balances (in shares) at Sep. 30, 2014	35,654,541
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 and related tax benefits	$ 205,628			4,869,810			0			0			5,075,438
Exercise of employee common stock options and related tax benefits (in shares)	205,628
Common dividends paid	$ 0			0			(13,378,246)			0			(13,378,246)
Issuance of restricted common shares, net of forfeitures	$ 251,196			(251,196)			0			0			0
Issuance of restricted common shares, net of forfeitures (in shares)	251,196
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	$ (64,304)			(890,194)			0			0			(954,498)
Restricted shares withheld for taxes and related tax benefit (in shares)	(64,304)
Compensation expense for restricted shares	$ 0			5,305,028			0			0			5,305,028
Net income	0			0			68,655,294			0			68,655,294
Other comprehensive income (loss)	0			0			0			(2,663,833)			(2,663,833)
Ending Balances at Sep. 30, 2015	$ 40,802,904			$ 835,279,986			$ 256,648,129			$ 1,494,535			$ 1,134,225,554
Balances (in shares) at Sep. 30, 2015	40,802,904