Earnings Per Common Share (Details 1) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Weighted-average shares outstanding - Basic:
Common stock	32,194	32,866	32,293	32,738
Participating restricted stock	1	161	34	244
Total	32,195	33,027	32,327	32,982
Weighted-average shares outstanding - Diluted:
Common stock	32,309	33,072	32,435	32,962
Participating restricted stock	1	161	34	244
Total	32,310	33,233	32,469	33,206