Summary of Capital Expenditures Including Accrued Amounts (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Total capital expenditures	$ 71,354	$ 73,681	$ 84,281	$ 164,860
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	59,453	70,527	70,731	153,361
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	686	1,168	1,341	1,899
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 11,215	$ 1,986	$ 12,209	$ 9,600