CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Preferred Stock, Cumulative Redeemable - dividend rate (as a percent)		8.50%
Preferred Stock, Cumulative Redeemable - Liquidation Preference per Share (in dollars per share)		$ 25.00
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Stock Repurchase Program Stock Repurchased and Retired During Period Value	$ 15,400,000	$ 9,700,000
Number of shares repurchased through the Company's publicly announced stock repurchase program	2,143,354	1,240,291
Adjustments Related to Tax Withholding for Share-based Compensation	$ 849,000	$ 2,500,000
Shares surrendered for tax purposes related to equity-based compensation awards	132,276	291,803
Series A Preferred Stock
Preferred Stock, Cumulative Redeemable - dividend rate (as a percent)	8.50%	8.50%
Preferred Stock, Cumulative Redeemable - Liquidation Preference per Share (in dollars per share)		$ 25
Series B Preferred Stock
Preferred Stock, Cumulative Redeemable - dividend rate (as a percent)	7.50%	0.00%
Preferred Stock, Cumulative Redeemable - Liquidation Preference per Share (in dollars per share)	$ 25.00