Stockholders' Equity (Shares repurchased under the stock repurchase program) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	803,985	1,153,998
Treasury Stock Acquired, Average Cost Per Share	$ 11.1	$ 14.66
Treasury Stock, Value	$ 105,379	$ 97,070
January 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		57,700
Treasury Stock Acquired, Average Cost Per Share		$ 14.73
Treasury Stock, Value		$ 850
February 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		649,700
Treasury Stock Acquired, Average Cost Per Share		$ 14.66
Treasury Stock, Value		$ 9,522
April 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	204,338
Treasury Stock Acquired, Average Cost Per Share	$ 14.38
Treasury Stock, Value	$ 2,939
May 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	48,200
Treasury Stock Acquired, Average Cost Per Share	$ 13.09
Treasury Stock, Value	$ 631
June 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	51,447
Treasury Stock Acquired, Average Cost Per Share	$ 12.81
Treasury Stock, Value	$ 659
July 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)	500,000
Treasury Stock Acquired, Average Cost Per Share	$ 9.39
Treasury Stock, Value	$ 4,696
August 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		100
Treasury Stock Acquired, Average Cost Per Share		$ 15.5
Treasury Stock, Value		$ 2
November 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		63,100
Treasury Stock Acquired, Average Cost Per Share		$ 14.69
Treasury Stock, Value		$ 927
December 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		1,885
Treasury Stock Acquired, Average Cost Per Share		$ 14.7
Treasury Stock, Value		$ 28
October 2014 [Member]
Equity, Class of Treasury Stock [Line Items]
Common shares repurchased as part of the stock repurchase program (Shares)		381,513
Treasury Stock Acquired, Average Cost Per Share		$ 14.64
Treasury Stock, Value		$ 5,585

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No definition available.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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