Recent Accounting Pronouncements (Tables)

6 Months Ended

Jun. 30, 2018

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Summary of Adjustments Made to Consolidated Statements of Income Due to Adoption of New Accounting Standards

The adjustments made to the Consolidated Statements of Income for the three and six months ended June 30, 2017 are as follows:

	For the Three Months Ended June 30, 2017						For the Six Months Ended June 30, 2017
(Dollars in thousands)	Previously Reported		Effect of Change		As Adjusted		Previously Reported		Effect of Change		As Adjusted
Operating income	$	40,773		1,286	$	42,059	$	64,682		3,192	$	67,874