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Goodwill and Other Intangibles - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill
Balance at beginning of year, net	$ 29,835	$ 29,835	$ 23,414	$ 0
Acquisitions	0	0	18,054	23,414
Impairment losses	0	0	(11,633)	0
Balance at end of year, net	$ 29,835	29,835	29,835	23,414
Accumulated impairment losses		$ (11,633)	$ (11,633)	$ 0	$ 0

X

- Definition

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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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of accumulated impairment loss for 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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