Stock Repurchase Program (Details) - USD ($)		2 Months Ended	7 Months Ended	12 Months Ended
	Aug. 21, 2015	Mar. 02, 2016	Aug. 15, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2015	Jan. 01, 2015
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount under stock repurchase plan			$ 93,600,000	$ 205,700,000				$ 103,800,000
Stock repurchased during period (in shares)			634,596
Average purchase price per share for share repurchase			$ 16.03
Payments for repurchase of common stock			$ 10,200,000	$ 305,004,000	$ 0	$ 0
Stock repurchase program, authorized amount			$ 300,000,000.0				$ 200,000,000.0
August 2015 Share Repurchase Pursuant To Tender Offer
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (in shares)	16,348,143
Average purchase price per share for share repurchase	$ 18.00
Payments for repurchase of common stock	$ 294,300,000
Stock repurchase program, authorized shares to be repurchased (in shares)	16,666,666
Repurchase of common stock related costs	$ 500,000
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (in shares)		995,650
Payments for repurchase of common stock		$ 14,800,000