Stock-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance	415,570	370,000	321,607
Granted	415,172	190,452	151,102
Exercised		(13,027)	(40,173)
Canceled/forfeited	(232,396)	(131,855)	(62,536)
Ending balance	598,346	415,570	370,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning Balance	$ 27.36	$ 30.20	$ 24.60
Weighted Average Grant Date Fair Value, Granted	$ 9.45	$ 20.41	$ 26.97
Weighted Average Grant Date Fair Value, Exercised		$ 10.77	$ 11.84
Weighted Average Grant Date Fair Value, Canceled/forfeited	$ 23.94	$ 29.30	$ 29.22
Weighted Average Exercise Price, Ending Balance	$ 16.26	$ 27.36	$ 30.20
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Beginning balance, SARs	50,209	68,865	107,639
Granted, SARs	0	0	0
Exercised, SARs		(6,617)	(34,385)
Canceled/forfeited, SARs	(3,637)	(12,039)	(4,389)
Ending balance, SARs	46,572	50,209	68,865
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$ 14.15	$ 13.83	$ 13.46
Weighted Average Grant Date Fair Value, Granted	$ 0	$ 0	$ 0.00
Period Weighted Average Grant Date Fair Value, Granted		$ 13.14	$ 12.73
Weighted Average Grant Date Fair Value, Canceled/forfeited	$ 15.40	$ 15.40	$ 15.40
Weighted Average Exercise Price, Ending Balance	$ 14.06	$ 14.15	$ 13.83