Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold (Tables)

12 Months Ended

Dec. 31, 2016

Cash And Cash Equivalents [Abstract]

Summary of Average Amount of Required Reserves

The average amount of required reserves for each of the years ended December 31, 2016 and 2015 is included in the following table:

	December 31,
	2016		2015
	(Dollars in thousands)
Vault cash and funds on deposit with the Federal Reserve Bank	$	1,754,956	$	1,499,137
Average required Reserves		41,968		40,093