Significant Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Fiscal Year End Date									--12-31
Weighted Average Number of Shares Outstanding, Basic	46,541	47,232	47,473	47,606	47,343	46,606	45,945	45,225	47,211	46,286	44,830
Incremental Common Shares Attributable to Stock Options									12	19	57
Incremental Common Shares Attributable to Contingently Issuable Shares									129	75	40
Weighted Average Number of Shares, Restricted Stock									201	255	585
Incremental Common Shares Attributable to Conversion of Debt Securities									0	857	1,700
Incremental Common Shares Attributable to Call Options and Warrants									0	901	1,029
Weighted Average Number of Shares Outstanding, Diluted	46,857	47,528	47,791	47,945	47,677	48,030	48,662	49,141	47,553	48,393	48,241