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

12 Months Ended

Dec. 31, 2014

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, 2014 and 2013 is included in the following table:

	December 31,
	2014		2013
	(Dollars in thousands)
Vault cash and funds on deposit with the Federal Reserve Bank	$	1,804,028	$	1,758,908
Average required reserves		44,711		37,456