Fair Value Measurements (Detail 2) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Total realized/unrealized gains (losses):
Transfers into/out of level 3, assets	$ 0	$ 0
Transfers into/out of level 3, liabilities	0	0
Securities Available-for-Sale
Level 3 Assets Measured on a Recurring Basis
Balance, beginning of period	3,547	3,633
Total realized/unrealized gains (losses):
Included in other comprehensive income	(1)	(16)
Balance, end of period	3,546	3,617
Equity Warrants
Level 3 Assets Measured on a Recurring Basis
Balance, beginning of period	882
Total realized/unrealized gains (losses):
Included in earnings	103	78
Additions	888	489
Settlements		(2)
Balance, end of period	1,873	$ 565
Contingent Consideration Asset
Level 3 Assets Measured on a Recurring Basis
Balance, beginning of period	2,930
Total realized/unrealized gains (losses):
Included in earnings	(325)
Balance, end of period	$ 2,605