Supplemental Cash Flow Disclosure

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Disclosure

Supplemental Cash Flow Disclosure

In 2012 and 2011, we allocated $44,500 and $97,000, respectively, of noncontrolling interests to additional paid-in capital with regard to the exchange of 11,473 and 15,947 units, respectively, for common stock. In addition, in 2012, we received 3,571 units as payment for amounts owed to us by a unit holder.

Depreciation and amortization expense is comprised of the following (in thousands):

	Year Ended December 31,
	2012		2011		2010
Depreciation and amortization from continuing operations	$	123,879	$	118,232	$	116,439
Depreciation and amortization from discontinued operations	5,607		20,660		31,224
Total depreciation and amortization expense	$	129,486	$	138,892	$	147,663

For the year ended December 31, 2012, our repayment of borrowings consisted of debt retirement of $828.0 million, payments on our line of credit of $192.0 million and normal recurring principal payments of $23.3 million.

For the year ended December 31, 2011, our repayment of borrowings consisted of debt retirement of $983.4 million, payments on our line of credit of $145.0 million and normal recurring principal payments of $7.4 million.