ACQUISITIONS (Details) £ in Thousands, $ in Thousands	1 Months Ended		3 Months Ended				12 Months Ended
	Nov. 30, 2014 USD ($)		Dec. 31, 2016 USD ($)	Dec. 31, 2016 GBP (£)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 GBP (£)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2016 GBP (£)	Mar. 31, 2015 USD ($)
Business Combination, Consideration Transferred [Abstract]
Settlement of preexisting business relationship at fair value							$ 0	$ 0		$ 931
Outstanding stock acquired	100.00%
Customer Relationships [Member]
Acquisition of assets and liabilities assumed [Abstract]
Intangible asset useful life	10 years
Tradename [Member]
Acquisition of assets and liabilities assumed [Abstract]
Intangible asset useful life	2 years
QCR AND Trio [Member]
Business Combination, Consideration Transferred [Abstract]
Cash	$ 3,196
Installment payment obligations	2,336	[1]	$ 800	£ 750					£ 750
Settlement of preexisting business relationship at fair value	931
Total	$ 6,463
Outstanding stock acquired	100.00%
First installment obligation paid					$ 1,100	£ 750
Post-closing indemnification obligations of certain of the sellers			$ 100
Acquisition of assets and liabilities assumed [Abstract]
Net tangible assets acquired	$ 5,248
Deferred tax liabilities	(336)
Total	6,463
QCR AND Trio [Member] | Customer Relationships [Member]
Acquisition of assets and liabilities assumed [Abstract]
Intangible assets	1,535
Intangible asset useful life							10 years
QCR AND Trio [Member] | Tradename [Member]
Acquisition of assets and liabilities assumed [Abstract]
Intangible assets	$ 16
Intangible asset useful life							2 years

[1] The installment payment obligation is denominated in British pounds ("GBP") and the amount in the table above is based on the GBP to U.S. dollar exchange rate at the acquisition date.