Stock-Based Compensation Plans (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options, Shares, Beginning balance	370,000	321,607	330,840
Stock options, Granted, Shares	190,452	151,102	139,916
Stock options, Exercised, Shares	(13,027)	(40,173)	(129,785)
Stock options, Shares, Canceled/Forfeited	(131,855)	(62,536)	(19,364)
Stock options, Shares, Ending balance	415,570	370,000	321,607
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Stock options, Weighted Average Exercise Price, Beginning balance	$ 30.20	$ 24.60	$ 24.60
Stock options, Weighted average exercise, granted	$ 20.41	$ 26.97	$ 27.39
Stock options, Weighted average exercise, exercised	$ 10.77	$ 11.84	$ 11.41
Stock options, Weighted average exercise, Canceled/Forfeited	$ 29.30	$ 29.22	$ 40.16
Stock options, Weighted Average Exercise Price, Ending balance	$ 27.36	$ 30.20	$ 24.60
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
SAR's, Shares, Beginning balance	68,865	107,639	230,563
SAR's, Granted, Shares	0	0	0
SAR's, Shares, Exercised	(6,617)	(34,385)	(119,801)
SAR's, Shares, Canceled/Forfeited	(12,039)	(4,389)	(3,123)
SAR's, Shares, Ending balance	50,209
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
SAR's, Weighted Average Exercise Price, Beginning balance	$ 13.83	$ 13.46	$ 13.46
SAR's, Weighted Average Exercise, Granted	$ 0	$ 0	$ 0.00
SAR's, Weighted Average Exercise, Exercised	$ 13.14	$ 12.73	$ 13.10
SAR's, Weighted Average Exercise, Canceled/Forfeited	$ 15.40	$ 15.40	$ 14.46
SAR's, Weighted Average Exercise Price, Ending balance	$ 14.15	$ 13.83	$ 13.46