COMMITMENTS AND CONTINGENCIES (Details) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended			6 Months Ended			12 Months Ended
	Dec. 11, 2012 item	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 23, 2011	Dec. 31, 2013 Capital Source Merger-Related Litigation item	Dec. 31, 2013 Capital Source Merger-Related Litigation California item	Dec. 31, 2013 Capital Source Merger-Related Litigation Delaware item	Dec. 31, 2013 Standby letters of credit	Dec. 31, 2012 Standby letters of credit
COMMITMENTS AND CONTINGENCIES
Total loan commitments to extend credit			$ 1,001,740,000	$ 849,607,000
Commitments and contingencies
Credit commitments									39,200,000	27,534,000
Expiration period of guarantees									1 year
Number of lawsuits	14					11	5	6
Commitments to purchase equipment being acquired for lease to others			8,475,000	4,399,000
Commitments to extend credit			1,049,415,000	881,540,000
Commitment to contribute capital to miscellaneous investments			11,000,000	10,800,000
Interpleader amounts on deposit			99,884.79		2,539,049
Amount of claim awarded against defender		$ 9,700,000