Benefit Plans - Additional Information (Detail) - USD ($)			3 Months Ended	6 Months Ended	12 Months Ended
		Jan. 29, 2014	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Decrease in projected benefit obligations			$ (22,900,000)	$ (22,900,000)
Decrease in accumulated other comprehensive loss, net of tax				$ (19,900,000)
Discount rate used to compute the obligation	[1]				4.02%	4.89%
Expected rate of return on plan assets				7.50%	7.50%	7.50%		7.50%
Curtailment loss			$ 750,000		$ 0	$ 0		$ 750,000
Net actuarial loss expected to be recognized as a component of net periodic pension expense					290,000
Projected benefit obligation					157,661,000	176,339,000
Salary expense					9,000,000	6,800,000		6,000,000
Expense for contributions to savings and investment plan					$ 7,100,000	6,000,000		2,600,000
Percentage increase in contribution					6.00%
Number of shares authorized under stock incentive plan					7,400,000
Shares of common stock were available for issuance					2,200,000
Stock-based compensation expense					$ 7,575,000	$ 7,489,000		$ 6,055,000
Stock-based compensation					$ 17,100,000
Average remaining vesting, years					3 years
Minimum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation			4.26%	4.26%		4.26%	[1]
Maximum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation			4.87%	4.87%		4.87%	[1]
Award vesting period					10 years
Non-qualified plans for former directors [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation					$ 3,400,000	$ 4,100,000
Funded plans for former directors [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Projected benefit obligation					1,600,000	2,100,000
Obligation included in other comprehensive loss, net of tax					1,000,000	1,200,000
Obligation included in other comprehensive loss, tax					748,000	$ 882,000
Stock Options [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock awards granted (in shares)						0		0
Stock Options and Restricted Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock-based compensation expense					8,800,000	$ 7,500,000		$ 6,000,000
Stock awards granted					$ 2,600,000	$ 3,900,000		$ 2,700,000
Restricted Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Vested (in shares)					559,958	524,663		217,305
Granted (in shares)					886,427	1,488,960		479,541
Restricted Stock [Member] | Minimum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period					3 years
Restricted Stock [Member] | Maximum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period					6 years
Performance Based Restricted Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period					3 years
Vested (in shares)					50,000
Granted (in shares)						240,000
Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period					3 years
Compensation costs related to restricted stock awards					$ 2,300,000
Granted (in shares)					313,212
Employee Stock Incentive Plan [Member] | Stock Options and Restricted Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value (usd per share)					$ 8.98
Employee Stock Incentive Plan [Member] | Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Weighted average grant date fair value (usd per share)					$ 10.09
Director Restricted Stock Plan [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Additional fees		$ 0
Other Pension Plan, Defined Benefit [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Discount rate used to compute the obligation			4.87%	4.87%	4.33%	4.02%			4.26%
Equity securities [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation for qualified plan, minimum					25.00%
Target asset allocation for qualified plan, maximum					65.00%
Cumulative annual real return					7.00%
Equity securities [Member] | Consumer Price Index [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period					5 years
Equity securities [Member] | S&P 500 Index [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period					3 years
Debt securities [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Target asset allocation for qualified plan, minimum					35.00%
Target asset allocation for qualified plan, maximum					75.00%
Fixed income securities [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return					3.00%
Fixed income securities [Member] | Consumer Price Index [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period					5 years
Fixed income securities [Member] | Merrill Lynch Intermediate Government/Corporate Index [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cumulative annual real return, period					3 years
Share-based Compensation Award, Tranche One [Member] | Employee Stock Incentive Plan [Member] | Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Annual vesting percentage					75.00%
Share-based Compensation Award, Tranche Two [Member] | Employee Stock Incentive Plan [Member] | Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Annual vesting percentage					25.00%

[1] The discount rate for 2013 increased from 4.26 percent to 4.87 percent due to the plans’ freeze and re-measurement at June 30, 2013.