Goodwill and Identifiable Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2012
Changes in the carrying amount of goodwill
Balance at the beginning of year	$ 114,588	$ 114,588
Additions	24,191
Impairment adjustment	727
Balance at the end of period	$ 138,052	$ 114,588