Partners' Capital (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Reconciliation of Changes in Total Partners' Capital

The following is a reconciliation of the changes in total partners’ capital for the period:

(dollars in thousands)	Six Months Ended June 30, 2018
Beginning balance of total controlling  partners’ capital	$	2,028,323
Exercise of stock options		3,045
Earned portion of non-vested stock		2,748
Stock option expense		7
Carrying value less than redemption value on redeemed    noncontrolling interest		(30	)
Adjustment to redemption value on limited partners’    redeemable capital interests		(1,565	)
Net income attributable to common unitholders		73,163
Amortization of terminated hedge included in AOCL		458
Change in fair value of derivatives		(74	)
Distributions		(92,635	)
Ending balance of total controlling partners’ capital	$	2,013,440