Share-Based Compensation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-Based Compensation [Abstract]
Share-based compensation costs	$ 2,310	$ 1,749	$ 5,867	$ 5,207
Shares [Roll Forward]
Outstanding, beginning of period (in shares)			4,325
Granted (in shares)			98
Exercised (in shares)			(119)
Forfeited (in shares)			(71)
Expired (in shares)			(494)
Outstanding, end of period (in shares)	3,739		3,739
Exercisable, end of period (in shares)	1,982		1,982
Weighted-Average Exercise Price [Roll Forward]
Outstanding, beginning of period (in dollars per share)			$ 15.09
Granted (in dollars per share)			$ 16.60
Exercised (in dollars per share)			$ 12.58
Forfeited (in dollars per share)			$ 12.83
Expired (in dollars per share)			$ 26.8
Outstanding, end of period (in dollars per share)	$ 13.7		$ 13.7
Exercisable, end of period (in dollars per share)	$ 15.67		$ 15.67
Weighted-Average Remaining Contractual Term (years) [Abstract]
Outstanding at September 30, 2014			6 years 6 months 7 days
Exercisable at September 30, 2014			5 years 5 months 5 days
Aggregate Intrinsic Value [Abstract]
Outstanding at September 30, 2014	14,810		14,810
Exercisable at September 30, 2014	$ 6,672		$ 6,672
Weighted average grant-date fair value of options per share (in dollars per share)			$ 9.05
Restricted Stock and Restricted Stock Units (RSUs) [Member]
Shares [Roll Forward]
Nonvested, beginning of period (in shares)			841
Granted (in shares)			430
Vested (in shares)			(173)
Forfeited (in shares)			(35)
Nonvested, end of period (in shares)	1,063		1,063
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning of period (in dollars per share)			$ 10.44
Granted (in dollars per share)			$ 16.85
Vested (in dollars per share)			$ 11.01
Forfeited (in dollars per share)			$ 11.39
Nonvested, end of period (in dollars per share)	$ 12.91		$ 12.91
Performance Shares [Member]
Shares [Roll Forward]
Nonvested, beginning of period (in shares)			0
Granted (in shares)			333
Vested (in shares)			0
Forfeited (in shares)			0
Nonvested, end of period (in shares)	333		333
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning of period (in dollars per share)			$ 0
Granted (in dollars per share)			$ 14.79
Vested (in dollars per share)			$ 0
Forfeited (in dollars per share)			$ 0
Nonvested, end of period (in dollars per share)	$ 14.79		$ 14.79