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Loans and Leases - Commitments (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Loans and leases |  |
Loan and lease commitments | $ 5,563,389 | $ 5,401,763
Real estate |  |
Loans and leases |  |
Loan and lease commitments | 1,608,186 | 1,509,914
Commercial and Industrial |  |
Loans and leases |  |
Loan and lease commitments | 2,449,440 | 2,406,261
Commercial Real Estate | Real estate |  |
Loans and leases |  |
Loan and lease commitments | 91,565 | 78,266
Construction | Real estate |  |
Loans and leases |  |
Loan and lease commitments | 530,143 | 450,856
Residential | Real estate |  |
Loans and leases |  |
Loan and lease commitments | 986,478 | 980,792
Consumer |  |
Loans and leases |  |
Loan and lease commitments | $ 1,505,763 | $ 1,485,588

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