Capital Stock, Stock Awards, and Stock Options (Stock Awards Rollforward) (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning of year, unvested, Number of Shares	207,917	77,319	48,359
Awarded, Number of Shares	70,165	145,348	44,030
Vested, Number of Shares	(71,585)	(7,134)	(13,132)
Forfeited, Number of Shares	(92,018)	(7,616)	(1,938)
End of year, unvested, Number of Shares	114,479	207,917	77,319
Beginning of year, Average Grant-Date Fair Value	$ 350.21	$ 424.45	$ 498.95
Awarded, Average Grant-Date Fair Value	$ 562.29	$ 321.56	$ 432.09
Vested, Average Grant-Date Fair Value	$ 515.09	$ 499.06	$ 722.67
Forfeited, Average Grant-Date Fair Value	$ 300.86	$ 417.79	$ 436.31
End of year, Average Grant-Date Fair Value	$ 424.65	$ 350.21	$ 424.45