Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Basic EPS Two Class Method:
Net Income	$ 2,474	$ 7,359	$ 14,743	$ 22,946	$ (2,442)
Income, share amounts	43,850,000	43,389,000	43,768,000	43,308,000
Earnings Per Share, Basic	$ 0.06	$ 0.17	$ 0.34	$ 0.53
Dilutive Securities:
Dilutive RSA's, Shares	564,000	288,000	469,000	249,000
Dilutive RSU's, Shares	59,000	27,000	62,000	67,000
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ 2,474	$ 7,359	$ 14,743	$ 22,946
Weighted Average Number of Shares Outstanding, Diluted	44,473,000	43,704,000	44,299,000	43,624,000
Earnings Per Share, Diluted	$ 0.06	$ 0.17	$ 0.33	$ 0.53
Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	1,400,000	1,600,000	1,400,000	1,600,000
Restricted Stock [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	200,000	200,000	300,000	300,000
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Contingently Issuable Shares Not Included in Diluted EPS	700,000	400,000	700,000	400,000