Stockholder's Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Treasury Stock Activity

The following represents the activity relating to the treasury stock held by the Company during the year endedDecember 31, 2017:

	Treasury stock shares	Cost (dollars in thousands)		Average cost per share
Balance outstanding at December 31, 2016	9,810,802	$	153,845	$	15.68
Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions	822,996	11,889		14.45
Shares of stock received in respect of indemnification claims	97,612	1,626		16.66
Purchase of treasury stock	1,401,866	19,486		13.90
Balance outstanding at December 31, 2017	12,133,276	$	186,846	$	15.40