Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2015

Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]

Fair value assets and liabilities measured on recurring basis

The following tables provide a summary of the Company’s significant financial assets and liabilities carried at fair value and measured on a recurring basis as of June 30, 2015 and December 31, 2014 (in thousands):

			Fair Value Measurements at June 30, 2015
	Carrying Value at June 30, 2015		Quoted Prices in Active Markets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Restricted investment:
Rabbi Trust	$	13,219	$	—	$	13,219	$	—
Fixed income securities	1,889		—		1,889		—
Interest rate cap derivatives	396		—		$	396	—
Liabilities:
Interest rate swap derivatives	$	18,041	$	—	$	18,041	$	—

			Fair Value Measurements at December 31, 2014
	Carrying Value at December 31, 2014		Quoted Prices in Active Markets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Restricted investments:
Rabbi Trust	$	11,281	$	—	$	11,281	$	—
Fixed income securities	1,966		—		1,966		—
Interest rate cap derivatives	570		—		570		—
Liabilities:
Interest rate swap derivatives	$	19,248	$	—	$	19,248	$	—