COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
COMMITMENTS AND CONTINGENCIES
Total commitments	$ 1,248,933	$ 1,191,212
Less: funded commitments	(1,118,077)	(1,050,674)
Total unfunded commitments	$ 130,856	$ 140,538