Capital Structure of CRLP Issuances of Common Units (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2011
Schedule of New Equity Issued
Stock issued during period, shares, new issues	8,061,591
Consideration for common shares issued through at-the-market equity offering program	$ 156,479	[1]
Weighted average price per common share issued	$ 19.76
Common units issued	8,061,591
Weighted average price per common unit	$ 19.76

[1] Amounts are shown net of underwriting discounts, but exclude $0.2 million of one-time administrative expenses paid by the Company during the six months ended June 30, 2011.