CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Assets:
Cash and due from banks		$ 111,941	$ 106,185
Short-term investments		2,039	1,612
Mortgage loans held for sale		25,414	29,434
Securities:
Available for sale, at fair value		754,720	739,912
Held to maturity, at amortized cost		14,721	15,633
Total securities		769,441	755,545
Federal Home Loan Bank stock, at cost		43,714	43,129
Loans:
Total loans	[1]	3,224,860	3,234,371
Less allowance for loan losses		26,446	26,004
Net loans		3,198,414	3,208,367
Premises and equipment, net		28,853	29,020
Investment in bank-owned life insurance		71,642	71,105
Goodwill		64,059	64,059
Identifiable intangible assets, net		9,898	10,175
Other assets		63,348	62,484
Total assets		4,388,763	4,381,115
Liabilities:
Demand deposits		596,974	585,960
NOW accounts		454,344	427,707
Money market accounts		762,233	730,075
Savings accounts		362,281	358,397
Time deposits		939,739	961,613
Total deposits		3,115,571	3,063,752
Federal Home Loan Bank advances		798,741	848,930
Junior subordinated debentures		22,681	22,681
Other liabilities		53,985	54,948
Total liabilities		3,990,978	3,990,311
Commitments and contingencies
Shareholders' Equity:
Common stock		1,075	1,073
Paid-in capital		116,200	115,123
Retained earnings		299,555	294,365
Accumulated other comprehensive loss		(19,045)	(19,757)
Total shareholders' equity		397,785	390,804
Total liabilities and shareholders’ equity		4,388,763	4,381,115
Commercial [Member]
Loans:
Total loans		1,762,499	1,771,666
Residential real estate [Member]
Loans:
Total loans		1,131,210	1,122,748
Consumer [Member]
Loans:
Total loans		$ 331,151	$ 339,957

[1] Includes net unamortized loan origination costs of $3.2 million and $3.0 million, respectively, at March 31, 2017 and December 31, 2016 and net unamortized premiums on purchased loans of $907 thousand and $783 thousand, respectively, at March 31, 2017 and December 31, 2016.