Employee Compensation Plans - Stock Appreciation Rights (Details) - $ / shares		12 Months Ended
	Jan. 06, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		1,974,610
Total weighted average strike price		$ 19.40
Total weighted average remaining contractual life		2 years 3 months
Total weighted average fair value per share		$ 3.17
January Nineteen Two Thousand Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		305,660
Strike price		$ 18.94
Remaining contractual life		18 days
Fair value per share		$ 0.2549
January 13, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		414,070
Strike price		$ 23.48
Remaining contractual life		2 years
Fair value per share		$ 2.218
January Nine Two Thousand Fifteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		467,940
Strike price		$ 21.94
Remaining contractual life		3 years
Fair value per share		$ 3.0808
January Fourteen Two Thousand Thirteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		325,700
Strike price		$ 15.94
Remaining contractual life		1 year
Fair value per share		$ 4.1733
January Fourteen Two Thousand Thirteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Number of OARs outstanding		461,240
Strike price		$ 15.89
Remaining contractual life		4 years
Fair value per share		$ 5.3254
Subsequent Event [Member] | Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Of Stock Appreciation Rights Granted	443,630