Consolidated Statements of Stockholders' Equity (Parenthetical) - shares	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 22, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Predecessor [Member]
Stock issued for benefit plans (shares)	0		352,476	154,665
Shares issued from stock option exercises	0		0	0
Purchase of treasury shares (shares)	65,170		70,437	102,673
Employee stock purchase plan (shares)	0		87,629	71,825
Issuance of restricted stock (shares)	229,690		304,166	392,292
Successor [Member]
Stock issued for benefit plans (shares)		0
Shares issued from stock option exercises		0
Purchase of treasury shares (shares)		22,485
Employee stock purchase plan (shares)		0
Issuance of restricted stock (shares)		76,058