Consolidated Statement of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Dividends declared per share (in dollars per share)	$ 0.54	$ 0.52	$ 0.36
Tax expense (benefit) on pension liability	$ 113	$ (448)	$ 605
Retained Deficit
Dividends declared per share (in dollars per share)	$ 0.54	$ 0.52	$ 0.36
Accumulated Other Comprehensive Income (Loss)
Tax expense (benefit) on pension liability	$ 113	$ 448	$ 605