Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share Diluted [Line Items]
Weighted average shares used for basic EPS	19,541	27,438	21,730	27,465
Dilutive effect of stock options and other share-based awards	231	362	295	428
Dilutive effect of convertible debt	409	737	463	844
Weighted average shares used for diluted EPS	20,181	28,537	22,488	28,737
Stock options and share-based awards [Member]
Earnings Per Share Diluted [Line Items]
Stock options and share-based awards not included in diluted EPS calculation because their effect would be antidilutive	2	64	7	77