Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Jul. 01, 2016	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Stockholders Equity [Line Items]
Common stock, shares issued		91,792,095	91,792,095		90,320,374
Unvested shares of common stock		3,509,369	3,509,369
Treasury stock, shares		6,519,773	6,519,773		6,519,773
Dividends paid to stockholders			$ 38,781,000	$ 36,262,000
Dividends payable		$ 18,849,000	$ 18,849,000	$ 18,391,000	$ 430,000
Share Repurchase Program, authorized amount						$ 250,000,000
Stock Repurchase Program, number of shares repurchased		0	0
Treasury stock at cost		$ 154,871,000	$ 154,871,000		$ 154,871,000
Maximum [Member]
Stockholders Equity [Line Items]
Share Repurchase Program, remaining authorized repurchase amount		$ 190,000,000	$ 190,000,000
2.75x Performance Restricted Shares [Member]
Stockholders Equity [Line Items]
Unvested shares of common stock		1,341,621	1,341,621		1,370,821
Accumulated dividends on unvested performance restricted shares			$ 3,600,000
Bonus Performance Restricted Shares [Member]
Stockholders Equity [Line Items]
Unvested shares of common stock		447,475	447,475		415,995
Accumulated dividends on unvested performance restricted shares			$ 188,000
Long-Term Incentive Performance Restricted Shares [Member]
Stockholders Equity [Line Items]
Unvested shares of common stock		219,569	219,569		62,365
Accumulated dividends on unvested performance restricted shares			$ 173,000
Dividends on shares probable of vesting			$ 56,000
Subsequent Events [Member]
Stockholders Equity [Line Items]
Dividends paid	$ 17,900,000