Business Combinations (Total Purchase Price for Unicorn) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total purchase price allocation:
Cash and cash equivalents	$ 13		$ 248
Goodwill	50,776us-gaap_Goodwill	22,018us-gaap_Goodwill
Liabilities assumed	(4,645)		(3,804)
Unicorn [Member]
Total purchase price allocation:
Cash and cash equivalents	13
Other tangible assets	4,173
Identifiable intangible assets	11,429
Goodwill	28,758
Liabilities assumed	(4,645)
Total purchase price	$ 39,728

Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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