Summary of Significant Accounting Policies and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Stock-Based Compensation, Valuation Assumptions

For time-vested option grants that resulted in compensation expense recognition, we used the following assumptions in our Black-Scholes valuation models:



	Years Ended December 31,
	2013	2012	2011
Risk-free interest rates	0.37% - 1.55%	0.33% - 0.83%	0.86% - 2.30%
Dividend yields	—%	—%	—%
Volatility factor of expected market price	.446 - .675	.530 - .710	.732 - .797
Weighted-average expected term of option	3.7 - 5 years	3.8 - 5 years	3.7 - 5 years
Forfeiture rate	—%	—%	—%