Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		$ 80,164		$ 77,262	$ 44,159
Other comprehensive income (loss) before reclassifications	$ (86)		$ 379	1,065	104
Less: amounts reclassified from accumulated other comprehensive income (loss)	(26)		146	(197)	570
Other comprehensive income (loss)	(60)	(510)	233	1,262	(466)
Balance at end of period	74,504	77,262	80,164	74,504	80,164
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	1,504	692	459	182	1,158
Other comprehensive income (loss)		(510)		1,262	(466)
Balance at end of period	$ 1,444	$ 182	$ 692	$ 1,444	$ 692