Dividends and Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 17, 2016	Mar. 18, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2015
Dividends and Share Repurchases
Cash dividends paid	$ 700	$ 700			$ 1,391	$ 1,399
Cash dividend (in dollars per share)	$ 0.125	$ 0.125
Dividends payable date of record	May 27, 2016	Feb. 26, 2016
Share repurchase program amount authorized								$ 10,000
Shares repurchased (in shares)			0	50,068
Weighted average price per share (in dollars per share)				$ 53.52
Shares paid for tax withholding for share-based compensation							53,154
Weighted average per share prices for shares used to pay tax withholding liability (in dollars per share)							$ 53.59