Income Taxes (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income tax expense	$ 3,877	$ 4,111		$ 12,351	$ 9,994
Effective income tax rate				38.60%	38.00%
One time income tax benefits	$ 600		$ 373
Effective income tax rate excluding discrete items				40.20%	39.40%