FAIR VALUE MEASURES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains (losses) from change in fair value of mortgages loans held for sale	$ 3,100	$ 3,000
Net gains (losses) from change in fair value of derivative financial instruments	$ 2,400	$ (622)
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	7 years
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	10 years