Shareholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Shareholders' Equity [Abstract]
Shareholders' equity, beginning of period			$ 13,006	$ 13,098
Net income (loss)	31,537	(9)	31,288	(680)
Dividends paid on common stock				(3,320)
Dividends paid on preferred stock			(13)	(13)
Stock based compensation			507	687
Treasury stock purchases			(399)	(126)
Changes in pension and postretirement benefit plans			297	290
Shareholders' equity, end of period	$ 44,686	$ 9,936	$ 44,686	$ 9,936