Capital Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Common shares, $0.01 par value (in shares)	28,945,228	27,117,450
Common shares, $0.01 par value	$ 290	$ 271
Class N preferred shares, $10.00 par value	$ 6	$ 6
Preferred Class N [Member]
Class N preferred shares, $10.00 par value (in shares)	592	592