Stockholders Equity - Annual (Details) $ / shares in Units, $ in Thousands			12 Months Ended
		Dec. 05, 2016	Dec. 31, 2016 USD ($) class $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)	May 19, 2015 USD ($) $ / shares shares
Equity, Class of Stock [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio		0.25
Adjustments to Additional Paid in Capital, Stock Split			$ 900
Common stock, shares authorized | shares			125,000,000
Preferred stock, shares authorized | shares			10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Number of classes | class			2
Proceeds from Issuance of Preferred Stock, net of issuance costs			$ 0	$ 117,194	$ 0
Treasury Stock, Shares [Roll Forward]
Treasury stock, shares, beginning of period | shares	[1]		8,628,933
Purchase of treasury stock, shares | shares	[1]		533,939
Treasury stock, shares, end of period | shares	[1]		9,810,802	8,628,933
Treasury Stock, Cost [Roll Forward]
Treasury stock, cost, beginning of period			$ 137,356
Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions			8,835	$ 8,907	$ 5,649
Purchase of treasury stock, cost			7,654
Treasury stock, cost, end of period			$ 153,845	$ 137,356
Treasury Stock, Average Cost Per Share [Roll Forward]
Treasury stock, average cost per share, beginning of period, in dollars per share | $ / shares	[1]		$ 15.92
Purchase of treasury stock, average cost per share, in dollars per share | $ / shares	[1]		14.33
Treasury stock, average cost per share, end of period, in dollars per share | $ / shares	[1]		$ 15.68	$ 15.92
Convertible Preferred Stock, Shares Issued upon Conversion | shares						38.0619
Convertible Preferred Stock, Threshold Percentage of Stock Price Trigger			150.00%
Treasury Stock
Treasury Stock, Shares [Roll Forward]
Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions | shares	[1]		647,930
Treasury Stock, Cost [Roll Forward]
Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions			$ 8,835
Treasury Stock, Average Cost Per Share [Roll Forward]
Shares purchased for minimum tax withholding under the Equity Plan or other similar transactions, Average Cost Per Share | $ / shares	[1]		$ 13.64
Convertible Preferred Stock
Equity, Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			5.625%
Proceeds from Issuance of Preferred Stock, net of issuance costs				$ 117,200
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs			$ 3,600
Preferred Stock, Liquidation Preference Per Share | $ / shares						$ 1,000
Convertible Preferred Stock | Retained Earnings/(Accumulated deficit)
Equity, Class of Stock [Line Items]
Dividends			$ 6,792	$ 4,075
Common Stock Class A
Equity, Class of Stock [Line Items]
Common stock, shares authorized | shares			62,500,000	62,500,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Treasury Stock, Shares [Roll Forward]
Treasury stock, shares, beginning of period | shares			8,628,933
Treasury stock, shares, end of period | shares			9,810,802	8,628,933
Treasury Stock, Cost [Roll Forward]
Treasury stock, cost, beginning of period			$ 137,356
Treasury stock, cost, end of period			$ 153,845	$ 137,356
Common Stock Class B
Equity, Class of Stock [Line Items]
Common stock, shares authorized | shares			62,500,000	62,500,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Call Option
Equity, Class of Stock [Line Items]
Option indexed to Issuer's Equity, Value						$ 15,900
Maximum
Equity, Class of Stock [Line Items]
Convertible Preferred Stock, Threshold Consecutive Trading Days			30 days
Maximum | Call Option
Equity, Class of Stock [Line Items]
Option Indexed to Issuer's Equity, Strike Price | $ / shares			$ 33.54
Minimum
Equity, Class of Stock [Line Items]
Convertible Preferred Stock, Threshold Consecutive Trading Days			20 days
Minimum | Call Option
Equity, Class of Stock [Line Items]
Option Indexed to Issuer's Equity, Strike Price | $ / shares			$ 26.27

[1] Share and per share amounts have been retroactively updated to reflect the one-for-four reverse stock split effective as of December 5, 2016.