Loans Receivable, Net ALLL and Loans Receivable Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	$ 94,504	$ 108,788
Collectively evaluated for impairment	9,418,306	8,178,761
Total loans receivable	9,512,810	8,287,549
Individually evaluated for impairment	95	3,223
Collectively evaluated for impairment	124,395	128,016
Total ALLL	124,490	131,239
Residential Real Estate \| Residential Real Estate
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	7,804	12,685
Collectively evaluated for impairment	918,584	875,057
Total loans receivable	926,388	887,742
Individually evaluated for impairment	0	83
Collectively evaluated for impairment	10,111	10,548
Total ALLL	10,111	10,631
Commercial
Loans Receivable and Allowance for Loan and Lease Losses
Total loans receivable	7,673,561	6,568,732
Commercial \| Commercial Real Estate
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	58,609	68,837
Collectively evaluated for impairment	5,520,698	4,588,724
Total loans receivable	5,579,307	4,657,561
Individually evaluated for impairment	73	568
Collectively evaluated for impairment	69,423	71,880
Total ALLL	69,496	72,448
Commercial \| Other Commercial
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	21,475	20,975
Collectively evaluated for impairment	2,072,779	1,890,196
Total loans receivable	2,094,254	1,911,171
Individually evaluated for impairment	10	2,313
Collectively evaluated for impairment	36,119	35,847
Total ALLL	36,129	38,160
Consumer and Other
Loans Receivable and Allowance for Loan and Lease Losses
Total loans receivable	912,861	831,075
Consumer and Other \| Home Equity
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	3,745	3,497
Collectively evaluated for impairment	613,456	541,191
Total loans receivable	617,201	544,688
Individually evaluated for impairment	0	39
Collectively evaluated for impairment	4,937	5,772
Total ALLL	4,937	5,811
Consumer and Other \| Other Consumer
Loans Receivable and Allowance for Loan and Lease Losses
Individually evaluated for impairment	2,871	2,794
Collectively evaluated for impairment	292,789	283,593
Total loans receivable	295,660	286,387
Individually evaluated for impairment	12	220
Collectively evaluated for impairment	3,805	3,969
Total ALLL	$ 3,817	$ 4,189

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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