Acquisition (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jun. 30, 2017	Dec. 31, 2016
Assets acquired:
Goodwill		$ 57,092	$ 59,678
Liabilities assumed:
Fair value of common stock issued		142,499	142,026
Long-term debt		$ 2,107,245	$ 2,160,881
Global One
Assets acquired:
Cash and due from banks	$ 9,554
Commercial and industrial loans	357,307
Goodwill	32,661
Other intangible assets	12,500
Other assets	3,904
Total assets acquired	415,926
Liabilities assumed:
Notes payable	358,560
Contingent consideration	12,234
Deferred tax liability, net	3,229
Other liabilities	11,903
Total liabilities assumed	385,926
Consideration paid	30,000
Cash paid	3,408
Fair value of common stock issued	26,592
Loans, unpaid principal balance	356,700
Long-term debt	$ 357,000