Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Accumulated Other Comprehensive Income Member	Noncontrolling Interest Member
Balance at Dec. 31, 2011	$ 829,247	$ 471	$ 244,211	$ (82,177)	$ (85)	$ 666,827
Balance (Share) at Dec. 31, 2011		47,194
Stock-based compensation	2,564	0	1,199	0	0	1,365
Common dividends	(5,366)	0	0	(5,366)	0	0
Net income	2,769	0	0	(825)	0	3,594
Conversion of restricted stock, net of shares withheld for taxes	(734)	2	(736)	0	0	0
Conversion of restricted stock, net of shares withheld for taxes (Shares)		158
Hedging gains or losses reclassified to earnings	319	0	0	0	59	260
Adjustment in fair value of derivatives	(36)	0	0	0	(7)	(29)
Non-controlling partner's impact of conversion of restricted units and options exercise	(801)	0	0	0	0	(801)
Distribution to non-controlling interest	(16,037)	0	0	0	0	(16,037)
Balance at Mar. 31, 2012	$ 811,925	$ 473	$ 244,674	$ (88,368)	$ (33)	$ 655,179
Balance (Share) at Mar. 31, 2012		47,352