Significant Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Weighted Average Number of Shares Outstanding, Basic	45,212	45,526	45,841	46,201	46,541	47,232	47,473	47,606	45,692	47,211	46,286
Incremental Common Shares Attributable to Stock Options									1	12	19
Incremental Common Shares Attributable to Contingently Issuable Shares									119	129	75
Weighted Average Number of Shares, Restricted Stock									182	201	255
Incremental Common Shares Attributable to Conversion of Debt Securities									0	0	857
Incremental Common Shares Attributable to Call Options and Warrants									0	0	901
Weighted Average Number of Shares Outstanding, Diluted	45,517	45,828	46,128	46,493	46,857	47,528	47,791	47,945	45,994	47,553	48,393