Basis of Presentation and Summary of Significant Accounting Policies (Earnings (Loss) Per Share) (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Summary of computation of basic and diluted net income (loss) per share
Weighted average shares outstanding:	20,937,627	20,707,926
Dilutive potential common shares:
Restricted stock	185,745	66,736
Stock options	954,509	759,581
2019 convertible senior notes	941,308	749,736
Shares used to compute diluted income per share	23,019,189	22,283,979
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	3,711,067	3,493,425