Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Estimated Fair Values and Carrying Amounts of Financial Instruments

The carrying amount and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are included in the tables below. See Note 1, Summary of Significant Accounting Policies, for a description of how fair value measurements are determined.

	December 31, 2016
(Dollars in thousands)	Carrying  Amount		Fair Value		Level 1		Level 2		Level 3
Financial Assets
Cash and cash equivalents	$	1,362,126	$	1,362,126	$	1,362,126	$	—	$	—
Investment securities	3,535,313		3,536,029		—		3,536,029		—
Loans and loans held for sale, net of unearned income and allowance for loan losses	15,077,293		15,066,055		—		157,041		14,909,014
FDIC loss share receivables	—		—		—		—		—
Derivative instruments	38,886		38,886		—		38,886		—
Financial Liabilities
Deposits	$	17,408,283	$	16,762,475	$	—	$	—	$	16,762,475
Short-term borrowings	509,136		509,136		334,136		175,000		—
Long-term debt	628,953		617,656		—		—		617,656
Derivative instruments	30,209		30,209		—		30,209		—
	December 31, 2015
(Dollars in thousands)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Financial Assets
Cash and cash equivalents	$	510,267	$	510,267	$	510,267	$	—	$	—
Investment securities	2,899,214		2,901,247		—		2,901,247		—
Loans and loans held for sale, net of unearned income and allowance for loan losses	14,355,297		14,674,749		—		166,247		14,508,502
FDIC loss share receivables	39,878		9,163		—		—		9,163
Derivative instruments	30,486		30,486		—		30,486		—
Financial Liabilities
Deposits	$	16,178,748	$	15,696,245	$	—	$	—	$	15,696,245
Short-term borrowings	326,617		326,617		216,617		110,000		—
Long-term debt	340,447		309,847		—		—		309,847
Derivative instruments	25,002		25,002		—		25,002		—