MERGERS AND ACQUISITIONS - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		12 Months Ended
	Mar. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets:
Cash and cash equivalents		$ 90,566	$ 60,783
Investment securities available for sale		990,613	689,132
Loans		5,160,797	3,077,656
Allowance for loan losses		(13,990)	(9,769)
Other real estate		30,110	15,346
Deferred tax asset, net		72,577	59,850
Other assets		99,124	53,032
Total assets		7,215,630	4,474,144
Liabilities:
Deposits		5,219,470	3,310,297
Short-term borrowings		764,600	375,500
Long-term debt		159,424	194,967
Total liabilities		6,201,399	3,911,595
Goodwill		339,538	152,152
Accretion of acquisition discount on purchased loans		$ 28,242	$ 21,078	$ 27,888
NewBridge Bancorp
Assets:
Cash and cash equivalents	$ 45,143
Investment securities available for sale	442,696
Loans	2,061,136
Allowance for loan losses	0
Loans held for sale	13,661
Federal Home Loan Bank stock, at cost	21,577
Premises and equipment	48,044
Bank-owned life insurance	61,747
Other real estate	1,186
Deferred tax asset, net	23,735
Other intangibles, net	19,890
Other assets	39,965
Total assets	2,778,780
Liabilities:
Deposits	1,990,109
Short-term borrowings	472,335
Long-term debt	31,724
Other liabilities	40,662
Total liabilities	2,534,830
Net assets acquired	243,950
Purchase price	431,336
Goodwill	187,386
As Reported by NewBridge | NewBridge Bancorp
Assets:
Cash and cash equivalents	45,143
Investment securities available for sale	443,535
Loans	2,087,331
Allowance for loan losses	(21,100)
Loans held for sale	13,661
Federal Home Loan Bank stock, at cost	21,577
Premises and equipment	43,408
Bank-owned life insurance	61,747
Other real estate	1,241
Deferred tax asset, net	30,014
Other intangibles, net	3,506
Other assets	40,375
Total assets	2,770,438
Liabilities:
Deposits	1,990,247
Short-term borrowings	471,800
Long-term debt	41,049
Other liabilities	34,461
Total liabilities	2,537,557
Net assets acquired	232,881
Accretion of acquisition discount on purchased loans	9,844
As Reported by NewBridge | NewBridge Bancorp | Core Deposits
Assets:
Other intangibles, net	(3,506)
Initial Fair Value Adjustments | NewBridge Bancorp
Assets:
Cash and cash equivalents	0
Investment securities available for sale	(1,948)
Loans	(26,195)
Allowance for loan losses	21,100
Loans held for sale	0
Federal Home Loan Bank stock, at cost	0
Premises and equipment	4,371
Bank-owned life insurance	0
Other real estate	0
Deferred tax asset, net	(3,490)
Other intangibles, net	16,384
Other assets	(271)
Total assets	9,951
Liabilities:
Deposits	(138)
Short-term borrowings	535
Long-term debt	(9,325)
Other liabilities	5,983
Total liabilities	(2,945)
Net assets acquired	12,896
Accretion of acquisition discount on purchased loans	32,589
Deferred loan costs of acquired loans	3,450
Measurement Period Adjustments | NewBridge Bancorp
Assets:
Cash and cash equivalents	0
Investment securities available for sale	1,109
Loans	0
Allowance for loan losses	0
Loans held for sale	0
Federal Home Loan Bank stock, at cost	0
Premises and equipment	265
Bank-owned life insurance	0
Other real estate	(55)
Deferred tax asset, net	(2,789)
Other intangibles, net	0
Other assets	(139)
Total assets	(1,609)
Liabilities:
Deposits	0
Short-term borrowings	0
Long-term debt	0
Other liabilities	218
Total liabilities	218
Net assets acquired	$ (1,827)