Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

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, in the 2016 Annual Report on Form 10-K for the year ended December 31, 2016 for a description of how fair value measurements are determined.

	September 30, 2017
(Dollars in thousands)	Carrying  Amount		Fair Value		Level 1		Level 2		Level 3
Financial Assets
Cash and cash equivalents	$	881,216	$	881,216	$	881,216	$	—	$	—
Investment securities	4,912,245		4,912,654		—		4,912,654		—
Loans and loans held for sale, net of unearned income and allowance for loan losses	19,799,675		19,810,531		—		141,218		19,669,313
Derivative instruments	31,779		31,779		—		31,779		—
Financial Liabilities
Deposits	$	21,334,271	$	21,333,374	$	—	$	—	$	21,333,374
Short-term borrowings	1,523,704		1,523,704		548,696		975,008		—
Long-term debt	1,127,584		1,114,132		—		—		1,114,132
Derivative instruments	28,453		28,453		—		28,453		—
	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
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		—