Supplemental Cash Flow Information - Supplemental Information About Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	$ 141,048	$ 231,946	$ 220,730
Cash paid for income taxes, net of $7,500, $13,336 and $5,822 for refunds in 2015, 2014 and 2013	108,090	93,875	67,759
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING ACTIVITIES:
Acquisition of property through accounts payable commitments	9,006	20,275	15,200
Contingent consideration liability	5,388
SUPPLEMENTAL DISCLOSURE OF NONCASH FINANCING ACTIVITIES:
Net settlement of stock options exercised		10	644
Net settlement of shares issued from the deferred compensation plan	2,949	527	$ 792
Vesting of restricted stock	2,742
Accrued dividends	$ 1,419	$ 63