Derivatives - Additional Information (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2015 USD ($) $ / shares shares	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Apr. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 31, 2015 USD ($) Counterparty
Derivatives Fair Value [Line Items]
Unrealized gain (loss) on derivatives, net of tax		$ 165,000	$ 2,861,000	$ (5,633,000)	$ 1,069,000
Recognized interest expense on derivatives into earnings, net of tax		(120,000)	(356,000)	(645,000)	(356,000)
Warrant
Derivatives Fair Value [Line Items]
Common shares issuable upon conversion of warrants | shares	1,250,764
Class of warrant exercisable period	3 years
Warrants exercise price | $ / shares	$ 22.50
Fair value derivative, liabilities	$ 1,500,000	100,000		100,000			$ 600,000
Fair value derivative, gain		0		500,000
Interest Rate Swaps
Derivatives Fair Value [Line Items]
Derivative notional amount						$ 13,100,000		$ 109,100,000
Number of counterparties | Counterparty								4
Unrealized fair market value gain (loss)				9,100,000
Unrealized gain (loss) on derivatives, net of tax		200,000	2,900,000	(5,600,000)	1,100,000
Unrealized gain (loss) on derivatives, tax expense		3,600,000	900,000	3,600,000	900,000
Recognized interest expense on derivatives into earnings, net of tax		100,000	400,000	600,000	400,000
Recognized interest expense on derivatives into earnings, tax expense (benefit)		(400,000)	$ 0	(400,000)	$ 0
Additional amount to be classified as an increase to interest expense during next 12 months		$ 2,000,000		$ 2,000,000